Add SQLite dashboard cache

app/api/v1/actuators.py

@@ -8,6 +8,7 @@ from pathlib import Path
 from fastapi import APIRouter, Depends, HTTPException, Query, Request, status
 from pydantic import BaseModel, Field
 
+from app.actuators.cache_db import DashboardCache
 from app.actuators.lifecycle import ActuatorReconciliationService
 from app.actuators.models import ActuatorRecord, AnomalyEvent, ReconciliationState, SensorWeightGroup
 from app.actuators.models import JobQueueItem, JobQueueState, JobStatus, SafetyProfile
@@ -864,6 +865,11 @@ def _load_cached_entity_map(
 
 
 def _load_entity_cache_payload(request: Request) -> dict[str, object]:
+    cache = getattr(request.app.state, "dashboard_cache", None)
+    if isinstance(cache, DashboardCache):
+        payload = cache.load_entities_payload()
+        if payload.get("entities"):
+            return payload
     path = _entity_cache_path(request)
     if not path.exists():
         return {}
@@ -875,18 +881,18 @@ def _load_entity_cache_payload(request: Request) -> dict[str, object]:
 
 
 def _save_cached_entities(request: Request, entities: list[HaEntitySummary]) -> None:
+    group_payload = _discovery_group_payload(entities)
+    cache = getattr(request.app.state, "dashboard_cache", None)
+    if isinstance(cache, DashboardCache):
+        cache.save_entities_payload(
+            entities=entities,
+            discovery_groups=group_payload,
+        )
     path = _entity_cache_path(request)
     path.parent.mkdir(parents=True, exist_ok=True)
-    group_counts: dict[tuple[str, str], int] = {}
-    for entity in discover_entities(entities):
-        key = (entity.category, entity.role.value)
-        group_counts[key] = group_counts.get(key, 0) + 1
     payload = {
         "updated_at": datetime.now(timezone.utc).isoformat(),
-        "discovery_groups": [
-            {"category": category, "role": role, "count": count}
-            for (category, role), count in sorted(group_counts.items())
-        ],
+        "discovery_groups": group_payload,
         "entities": [entity.model_dump(mode="json") for entity in entities],
     }
     temporary = path.with_suffix(".json.tmp")
@@ -897,6 +903,17 @@ def _save_cached_entities(request: Request, entities: list[HaEntitySummary]) ->
     os.replace(temporary, path)
 
 
+def _discovery_group_payload(entities: list[HaEntitySummary]) -> list[dict[str, object]]:
+    group_counts: dict[tuple[str, str], int] = {}
+    for entity in discover_entities(entities):
+        key = (entity.category, entity.role.value)
+        group_counts[key] = group_counts.get(key, 0) + 1
+    return [
+        {"category": category, "role": role, "count": count}
+        for (category, role), count in sorted(group_counts.items())
+    ]
+
+
 def _deduplicate_actuator_ids(
     discovered: list[tuple[str, str]],
     entities: dict[str, HaEntitySummary],