refactor(api): tighten types in trivial lint and config fixes

[tmimmanuel]

Summary

• Remove unused grpc import and fix Points argument type in qdrant vector adapter
• Replace deprecated type comment with annotation in relyt vector adapter
• Suppress chromadb private import warnings (Settings, DEFAULT_TENANT, DEFAULT_DATABASE) and fix results redeclaration
• Suppress unstructured private/unused import warnings (side-effect imports)
• Rename _create_collection_if_not_exists → create_collection_if_not_exists in analyticdb adapters (called externally)
• Add Iterator[Any] return type to _get_cursor context manager in analyticdb SQL adapter
• Add pgvecto_rs.sqlalchemy to allowedUntypedLibraries in pyrightconfig

Test plan

• make type-check-core passes with 0 errors
• All 105 affected unit tests pass (analyticdb, qdrant, chroma, relyt, unstructured)
• No runtime behavior changes — type annotations and renames only

Part of #26412

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-04-08 21:32:17.735052780 +0000
+++ /tmp/pyrefly_pr.txt	2026-04-08 21:32:08.758993040 +0000
@@ -62,8 +62,6 @@
    --> core/rag/datasource/keyword/jieba/jieba.py:157:29
 ERROR Argument `object` is not assignable to parameter `iterable` with type `Iterable[@_]` in function `list.__init__` [bad-argument-type]
   --> core/rag/datasource/keyword/jieba/jieba_keyword_table_handler.py:88:35
-ERROR Class member `AnalyticdbVector.add_texts` overrides parent class `BaseVector` in an inconsistent manner [bad-override]
-  --> core/rag/datasource/vdb/analyticdb/analyticdb_vector.py:43:9
 ERROR Argument `str | None` is not assignable to parameter `namespace_password` with type `str` in function `alibabacloud_gpdb20160503.models._create_namespace_request.CreateNamespaceRequest.__init__` [bad-argument-type]
    --> core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py:120:40
 ERROR Argument `str | None` is not assignable to parameter `namespace_password` with type `str` in function `alibabacloud_gpdb20160503.models._describe_collection_request.DescribeCollectionRequest.__init__` [bad-argument-type]

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-04-08 21:33:58.874034827 +0000
+++ /tmp/pyrefly_pr.txt	2026-04-08 21:33:49.096996705 +0000
@@ -62,8 +62,6 @@
    --> core/rag/datasource/keyword/jieba/jieba.py:157:29
 ERROR Argument `object` is not assignable to parameter `iterable` with type `Iterable[@_]` in function `list.__init__` [bad-argument-type]
   --> core/rag/datasource/keyword/jieba/jieba_keyword_table_handler.py:88:35
-ERROR Class member `AnalyticdbVector.add_texts` overrides parent class `BaseVector` in an inconsistent manner [bad-override]
-  --> core/rag/datasource/vdb/analyticdb/analyticdb_vector.py:43:9
 ERROR Argument `str | None` is not assignable to parameter `namespace_password` with type `str` in function `alibabacloud_gpdb20160503.models._create_namespace_request.CreateNamespaceRequest.__init__` [bad-argument-type]
    --> core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py:120:40
 ERROR Argument `str | None` is not assignable to parameter `namespace_password` with type `str` in function `alibabacloud_gpdb20160503.models._describe_collection_request.DescribeCollectionRequest.__init__` [bad-argument-type]