chore: Export PgVectorStore and add pgvector dependencies

- Add PgVectorStore to vector_store exports
- Add vectorstore-pgvector optional dependency
- Include psycopg[binary], psycopg2-binary, pgvector

pyproject.toml

@@ -128,9 +128,10 @@ vectorstore-qdrant = ["qdrant-client>=1.0.0"]
 vectorstore-weaviate = ["weaviate-client>=4.0.0"]
 vectorstore-pinecone = ["pinecone-client>=3.0.0"]
 vectorstore-milvus = ["pymilvus>=2.0.0"]
+vectorstore-pgvector = ["psycopg[binary]>=3.0.0", "psycopg2-binary>=2.9.0", "pgvector>=0.2.0"]
 
 vectorstore-all = [
-  "semantica[vectorstore-qdrant,vectorstore-weaviate,vectorstore-pinecone,vectorstore-milvus]"
+  "semantica[vectorstore-qdrant,vectorstore-weaviate,vectorstore-pinecone,vectorstore-milvus,vectorstore-pgvector]"
 ]
 
 # ---- Infra / Queues / Workers ----

semantica/vector_store/__init__.py

@@ -147,6 +147,7 @@ from .methods import (
 )
 from .milvus_store import MilvusStore, MilvusClient, MilvusCollection, MilvusSearch
 from .namespace_manager import Namespace, NamespaceManager
+from .pgvector_store import PgVectorStore
 from .pinecone_store import PineconeStore, PineconeClient, PineconeIndex, PineconeSearch
 from .qdrant_store import QdrantStore, QdrantClient, QdrantCollection, QdrantSearch
 from .registry import MethodRegistry, method_registry
@@ -189,6 +190,8 @@ __all__ = [
     "PineconeClient",
     "PineconeIndex",
     "PineconeSearch",
+    # PgVector
+    "PgVectorStore",
     # Hybrid search
     "HybridSearch",
     "MetadataFilter",