chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/embeddings_queue/00001-embeddings.sqlite.sql

@@ -0,0 +1,10 @@
+CREATE TABLE embeddings_queue (
+    seq_id INTEGER PRIMARY KEY,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    operation INTEGER NOT NULL,
+    topic TEXT NOT NULL,
+    id TEXT NOT NULL,
+    vector BLOB,
+    encoding TEXT,
+    metadata TEXT
+);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/embeddings_queue/00002-embeddings-queue-config.sqlite.sql

@@ -0,0 +1,4 @@
+CREATE TABLE embeddings_queue_config (
+    id INTEGER PRIMARY KEY,
+    config_json_str TEXT
+);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/metadb/00001-embedding-metadata.sqlite.sql

@@ -0,0 +1,24 @@
+CREATE TABLE embeddings (
+    id INTEGER PRIMARY KEY,
+    segment_id TEXT NOT NULL,
+    embedding_id TEXT NOT NULL,
+    seq_id BLOB NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE (segment_id, embedding_id)
+);
+
+CREATE TABLE embedding_metadata (
+    id INTEGER REFERENCES embeddings(id),
+    key TEXT NOT NULL,
+    string_value TEXT,
+    int_value INTEGER,
+    float_value REAL,
+    PRIMARY KEY (id, key)
+);
+
+CREATE TABLE max_seq_id (
+    segment_id TEXT PRIMARY KEY,
+    seq_id BLOB NOT NULL
+);
+
+CREATE VIRTUAL TABLE embedding_fulltext USING fts5(id, string_value);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/metadb/00002-embedding-metadata.sqlite.sql

@@ -0,0 +1,5 @@
+-- SQLite does not support adding check with alter table, as a result, adding a check
+-- involve creating a new table and copying the data over. It is over kill with adding
+-- a boolean type column. The application write to the table needs to ensure the data
+-- integrity.
+ALTER TABLE embedding_metadata ADD COLUMN bool_value INTEGER

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/metadb/00003-full-text-tokenize.sqlite.sql

@@ -0,0 +1,3 @@
+CREATE VIRTUAL TABLE embedding_fulltext_search USING fts5(string_value, tokenize='trigram');
+INSERT INTO embedding_fulltext_search (rowid, string_value) SELECT rowid, string_value FROM embedding_metadata;
+DROP TABLE embedding_fulltext;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/metadb/00004-metadata-indices.sqlite.sql

@@ -0,0 +1,3 @@
+CREATE INDEX IF NOT EXISTS embedding_metadata_int_value ON embedding_metadata (key, int_value) WHERE int_value IS NOT NULL;
+CREATE INDEX IF NOT EXISTS embedding_metadata_float_value ON embedding_metadata (key, float_value) WHERE float_value IS NOT NULL;
+CREATE INDEX IF NOT EXISTS embedding_metadata_string_value ON embedding_metadata (key, string_value) WHERE string_value IS NOT NULL;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/metadb/00005-max-seq-id-int.sqlite.sql

@@ -0,0 +1,27 @@
+ALTER TABLE max_seq_id ADD COLUMN int_seq_id INTEGER;
+
+-- Convert 8 byte wide big-endian integer as blob to native 64 bit integer.
+-- Adapted from https://stackoverflow.com/a/70296198.
+UPDATE max_seq_id SET int_seq_id = (
+  SELECT (
+       (instr('123456789ABCDEF', substr(hex(seq_id), -1 , 1)) <<  0)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -2 , 1)) <<  4)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -3 , 1)) <<  8)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -4 , 1)) << 12)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -5 , 1)) << 16)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -6 , 1)) << 20)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -7 , 1)) << 24)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -8 , 1)) << 28)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -9 , 1)) << 32)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -10, 1)) << 36)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -11, 1)) << 40)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -12, 1)) << 44)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -13, 1)) << 48)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -14, 1)) << 52)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -15, 1)) << 56)
+     | (instr('123456789ABCDEF', substr(hex(seq_id), -16, 1)) << 60)
+    )
+);
+
+ALTER TABLE max_seq_id DROP COLUMN seq_id;
+ALTER TABLE max_seq_id RENAME COLUMN int_seq_id TO seq_id;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00001-collections.sqlite.sql

@@ -0,0 +1,15 @@
+CREATE TABLE collections (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    topic TEXT NOT NULL,
+    UNIQUE (name)
+);
+
+CREATE TABLE collection_metadata (
+    collection_id TEXT REFERENCES collections(id) ON DELETE CASCADE,
+    key TEXT NOT NULL,
+    str_value TEXT,
+    int_value INTEGER,
+    float_value REAL,
+    PRIMARY KEY (collection_id, key)
+);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00002-segments.sqlite.sql

@@ -0,0 +1,16 @@
+CREATE TABLE segments (
+    id TEXT PRIMARY KEY,
+    type TEXT NOT NULL,
+    scope TEXT NOT NULL,
+    topic TEXT,
+    collection TEXT REFERENCES collection(id)
+);
+
+CREATE TABLE segment_metadata (
+    segment_id TEXT  REFERENCES segments(id) ON DELETE CASCADE,
+    key TEXT NOT NULL,
+    str_value TEXT,
+    int_value INTEGER,
+    float_value REAL,
+    PRIMARY KEY (segment_id, key)
+);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00003-collection-dimension.sqlite.sql

@@ -0,0 +1 @@
+ALTER TABLE collections ADD COLUMN dimension INTEGER;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00004-tenants-databases.sqlite.sql

@@ -0,0 +1,29 @@
+CREATE TABLE IF NOT EXISTS tenants (
+    id TEXT PRIMARY KEY,
+    UNIQUE (id)
+);
+
+CREATE TABLE IF NOT EXISTS databases (
+    id TEXT PRIMARY KEY, -- unique globally
+    name TEXT NOT NULL, -- unique per tenant
+    tenant_id TEXT NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+    UNIQUE (tenant_id, name) -- Ensure that a tenant has only one database with a given name
+);
+
+CREATE TABLE IF NOT EXISTS collections_tmp (
+    id TEXT PRIMARY KEY, -- unique globally
+    name TEXT NOT NULL, -- unique per database
+    topic TEXT NOT NULL,
+    dimension INTEGER,
+    database_id TEXT NOT NULL REFERENCES databases(id) ON DELETE CASCADE,
+    UNIQUE (name, database_id)
+);
+
+-- Create default tenant and database
+INSERT OR REPLACE INTO tenants (id) VALUES ('default_tenant'); -- The default tenant id is 'default_tenant' others are UUIDs
+INSERT OR REPLACE INTO databases (id, name, tenant_id) VALUES ('00000000-0000-0000-0000-000000000000', 'default_database', 'default_tenant');
+
+INSERT OR REPLACE INTO collections_tmp (id, name, topic, dimension, database_id)
+    SELECT id, name, topic, dimension, '00000000-0000-0000-0000-000000000000' FROM collections;
+DROP TABLE collections;
+ALTER TABLE collections_tmp RENAME TO collections;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00005-remove-topic.sqlite.sql

@@ -0,0 +1,4 @@
+-- Remove the topic column from the Collections and Segments tables
+
+ALTER TABLE collections DROP COLUMN topic;
+ALTER TABLE segments DROP COLUMN topic;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00006-collection-segment-metadata.sqlite.sql

@@ -0,0 +1,6 @@
+-- SQLite does not support adding check with alter table, as a result, adding a check
+-- involve creating a new table and copying the data over. It is over kill with adding
+-- a boolean type column. The application write to the table needs to ensure the data
+-- integrity.
+ALTER TABLE collection_metadata ADD COLUMN bool_value INTEGER;
+ALTER TABLE segment_metadata ADD COLUMN bool_value INTEGER;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00007-collection-config.sqlite.sql

@@ -0,0 +1,2 @@
+-- Stores collection configuration dictionaries.
+ALTER TABLE collections ADD COLUMN config_json_str TEXT;

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00008-maintenance-log.sqlite.sql

@@ -0,0 +1,7 @@
+-- Records when database maintenance operations are performed.
+-- At time of creation, this table is only used to record vacuum operations.
+CREATE TABLE maintenance_log (
+  id INT PRIMARY KEY,
+  timestamp INT NOT NULL,
+  operation TEXT NOT NULL
+);

backend_service/venv/lib/python3.13/site-packages/chromadb/migrations/sysdb/00009-segment-collection-not-null.sqlite.sql

@@ -0,0 +1,11 @@
+-- This makes segments.collection non-nullable.
+CREATE TABLE segments_temp (
+    id TEXT PRIMARY KEY,
+    type TEXT NOT NULL,
+    scope TEXT NOT NULL,
+    collection TEXT REFERENCES collection(id) NOT NULL
+);
+
+INSERT INTO segments_temp SELECT * FROM segments;
+DROP TABLE segments;
+ALTER TABLE segments_temp RENAME TO segments;