chore: add interaction tracing and remove personal fields from logs

app/api/routes/device_ws.py

@@ -219,6 +219,13 @@ async def _handle_home_request(
     request_id = frame.get("request_id") or str(uuid4())
     message: str = frame.get("message", "")
     session_id: str = frame.get("session_id") or str(uuid4())
+    logger.info(
+        "device_ws: home_request_start user=%s req=%s session=%s msg=%s",
+        user_id,
+        request_id,
+        session_id,
+        message[:200],
+    )
 
     # ── Memory: enrich context before LLM call ────────────────────────
     async with async_session() as db:
@@ -256,6 +263,13 @@ async def _handle_home_request(
         await memory.store_episode(
             user_id, session_id, message, "".join(response_chunks), trace_id=request_id
         )
+    logger.info(
+        "device_ws: home_request_end user=%s req=%s session=%s response_chars=%d",
+        user_id,
+        request_id,
+        session_id,
+        len("".join(response_chunks)),
+    )
 
 
 async def _handle_floating_request(
@@ -268,6 +282,14 @@ async def _handle_floating_request(
     message: str = frame.get("message", "")
     session_id: str = frame.get("session_id") or str(uuid4())
     scope: dict = frame.get("scope", {})
+    logger.info(
+        "device_ws: floating_request_start user=%s req=%s session=%s scope=%s msg=%s",
+        user_id,
+        request_id,
+        session_id,
+        json.dumps(scope, ensure_ascii=True)[:200],
+        message[:200],
+    )
 
     # ── Memory: enrich context before LLM call ────────────────────────
     async with async_session() as db:
@@ -304,6 +326,13 @@ async def _handle_floating_request(
         await memory.store_episode(
             user_id, session_id, message, "".join(response_chunks), trace_id=request_id
         )
+    logger.info(
+        "device_ws: floating_request_end user=%s req=%s session=%s response_chars=%d",
+        user_id,
+        request_id,
+        session_id,
+        len("".join(response_chunks)),
+    )
 
 
 # ── Heartbeat ─────────────────────────────────────────────────────────