fix(qdrant): add missing payload indices for bitemporal, session, and monitoring collections

Same root cause as prior is_deleted/is_archived fixes: several collections
(hippocampai_bitemporal_facts, sessions, monitoring health/traces) filter
on fields at query time but never created payload indices for them,
causing 400 Bad Request from Qdrant on scroll/search.

Author: rexdivakar

src/hippocampai/monitoring/storage.py

@@ -6,7 +6,7 @@
 from typing import Any, Optional
 
 import numpy as np
-from qdrant_client.models import Distance, VectorParams
+from qdrant_client.models import Distance, PayloadSchemaType, VectorParams
 
 from hippocampai.monitoring.memory_health import (
     MemoryQualityReport,
@@ -68,6 +68,12 @@ def _init_collections(self) -> None:
                     collection_name=self.collection_health,
                     vectors_config=VectorParams(size=1, distance=Distance.COSINE),
                 )
+                for field_name in ("user_id", "health_status"):
+                    self.qdrant.client.create_payload_index(
+                        collection_name=self.collection_health,
+                        field_name=field_name,
+                        field_schema=PayloadSchemaType.KEYWORD,
+                    )
                 logger.info(f"Initialized collection: {self.collection_health}")
             except Exception as e:
                 logger.debug(f"Collection {self.collection_health} creation failed: {e}")
@@ -82,6 +88,17 @@ def _init_collections(self) -> None:
                     collection_name=self.collection_traces,
                     vectors_config=VectorParams(size=1, distance=Distance.COSINE),
                 )
+                for field_name in ("operation", "user_id", "session_id", "memory_type"):
+                    self.qdrant.client.create_payload_index(
+                        collection_name=self.collection_traces,
+                        field_name=field_name,
+                        field_schema=PayloadSchemaType.KEYWORD,
+                    )
+                self.qdrant.client.create_payload_index(
+                    collection_name=self.collection_traces,
+                    field_name="success",
+                    field_schema=PayloadSchemaType.BOOL,
+                )
                 logger.info(f"Initialized collection: {self.collection_traces}")
             except Exception as e:
                 logger.debug(f"Collection {self.collection_traces} creation failed: {e}")

src/hippocampai/session/session_manager.py

@@ -118,6 +118,15 @@ def _initialize_collection(self) -> None:
                 collection_name=self.collection_name,
                 vectors_config=VectorParams(size=self.embedder.dimension, distance=Distance.COSINE),
             )
+            # Index fields used by search_sessions/get_user_sessions filters
+            from qdrant_client.models import PayloadSchemaType
+
+            for field_name in ("user_id", "status", "tags"):
+                self.qdrant.client.create_payload_index(
+                    collection_name=self.collection_name,
+                    field_name=field_name,
+                    field_schema=PayloadSchemaType.KEYWORD,
+                )
             logger.info(f"Created session collection '{self.collection_name}'")
 
     def create_session(

src/hippocampai/storage/bitemporal_store.py

@@ -9,7 +9,7 @@
 from typing import Any, Optional
 
 import numpy as np
-from qdrant_client.models import Distance, VectorParams
+from qdrant_client.models import Distance, PayloadSchemaType, VectorParams
 
 from hippocampai.models.bitemporal import (
     BiTemporalFact,
@@ -58,6 +58,13 @@ def _ensure_collection(self) -> None:
                         distance=Distance.COSINE,
                     ),
                 )
+                # Index fields used by _build_query_filters for fast filtered queries
+                for field_name in ("user_id", "entity_id", "property_name", "status"):
+                    self.qdrant.client.create_payload_index(
+                        collection_name=self.collection_name,
+                        field_name=field_name,
+                        field_schema=PayloadSchemaType.KEYWORD,
+                    )
                 logger.info(f"Created bi-temporal collection: {self.collection_name}")
         except ConnectionError as e:
             logger.warning(