Initial commit - Phase 3/4

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/backend/api/health.py

@@ -1,6 +1,7 @@
 """Health check endpoints."""
 from fastapi import APIRouter
 from pydantic import BaseModel
+import aiosqlite
 
 router = APIRouter()
 
@@ -21,6 +22,28 @@ async def health_check():
 
 @router.get("/ready")
 async def readiness_check():
-    """Readiness check endpoint."""
-    # TODO: Check if PM3 is connected, database is accessible, etc.
-    return {"ready": True}
+    """Readiness check endpoint.
+
+    Checks:
+    - Database connectivity
+    """
+    from .. import config
+
+    checks = {"database": False}
+    reasons = []
+
+    # Check database connectivity
+    try:
+        async with aiosqlite.connect(config.DATABASE_PATH) as db:
+            await db.execute("SELECT 1")
+            checks["database"] = True
+    except Exception as e:
+        reasons.append(f"Database: {str(e)}")
+
+    all_ready = all(checks.values())
+
+    return {
+        "ready": all_ready,
+        "checks": checks,
+        "reasons": reasons if not all_ready else None
+    }