fix: prevent P2 from owning Qdrant lifecycle

harness/tht/adapters/vector/qdrant.py

@@ -55,6 +55,7 @@ class QdrantVectorStore:
         workspace_id: str,
         workspace_revision: str | None = None,
         expected_dimension: int | None = None,
+        collection_lifecycle: str = "create_if_missing",
         request: Callable[..., object] | None = None,
         connect_timeout: float = 2.0,
         read_timeout: float = 10.0,
@@ -64,6 +65,9 @@ class QdrantVectorStore:
         self._workspace_id = workspace_id
         self._workspace_revision = workspace_revision
         self._expected_dimension = expected_dimension
+        if collection_lifecycle not in ("create_if_missing", "require_existing"):
+            raise ValueError("Unsupported Qdrant collection lifecycle")
+        self._collection_lifecycle = collection_lifecycle
         self._request = request or requests.request
         self._timeout = (connect_timeout, read_timeout)
 
@@ -306,6 +310,8 @@ class QdrantVectorStore:
         if response is None:
             if not strict:
                 raise VectorStoreError("Qdrant collection is missing")
+            if self._collection_lifecycle == "require_existing":
+                raise VectorStoreError("Qdrant collection configuration mismatch (semantic_index_incompatible)")
             self._call(
                 "PUT",
                 f"/collections/{self._collection}",
@@ -328,11 +334,17 @@ class QdrantVectorStore:
             self._expected_dimension is not None
             and (size != self._expected_dimension or distance != "Cosine")
         ):
-            raise VectorStoreError("Qdrant collection configuration mismatch")
+            raise VectorStoreError("Qdrant collection configuration mismatch (semantic_index_incompatible)")
+        payload_schema = result.get("payload_schema")
+        if not isinstance(payload_schema, dict):
+            raise VectorStoreError("Qdrant returned malformed collection response")
         for field_name in _KEYWORD_INDEXES:
-            if field_name not in result.get("payload_schema", {}):
+            field = payload_schema.get(field_name)
+            if not isinstance(field, dict) or field.get("data_type") != "keyword":
                 if not strict:
                     raise VectorStoreError("Qdrant collection payload indexes mismatch")
+                if self._collection_lifecycle == "require_existing":
+                    raise VectorStoreError("Qdrant collection configuration mismatch (semantic_index_incompatible)")
                 self._call(
                     "PUT",
                     f"/collections/{self._collection}/index",