Revert "feat(multimodal): 补齐阶段F运行管理与收尾验收"

This reverts commit 64f63ff1bd.

backend/app/services/model_diagnostics.py

@@ -1,37 +0,0 @@
-"""Bounded, durable diagnostics. No payloads, paths, exception text or credentials."""
-import json
-import logging
-import math
-from contextlib import closing
-from datetime import datetime, timezone
-
-from app.database.db import connect, transaction
-
-TEXT = {"model", "revision", "operation", "source", "requested_device", "actual_device",
-        "attempted_device", "fallback_reason", "error_code", "status", "request_id", "attempt_id"}
-NUMBERS = {"load_seconds", "inference_seconds", "elapsed_seconds", "peak_memory_bytes", "queue_seconds"}
-
-
-def connection():
-    conn = connect()
-    conn.execute("CREATE TABLE IF NOT EXISTS model_diagnostics (id INTEGER PRIMARY KEY AUTOINCREMENT, record_json TEXT NOT NULL)")
-    return conn
-
-
-def record(**values):
-    safe = {key: value[:240] for key, value in values.items() if key in TEXT and isinstance(value, str)}
-    safe.update({key: value for key, value in values.items()
-                 if key in NUMBERS and type(value) in (float, int) and math.isfinite(value) and value >= 0})
-    safe["timestamp"] = datetime.now(timezone.utc).isoformat()
-    try:
-        with closing(connection()) as conn, transaction(conn):
-            conn.execute("INSERT INTO model_diagnostics(record_json) VALUES (?)", (json.dumps(safe),))
-            conn.execute("DELETE FROM model_diagnostics WHERE id NOT IN (SELECT id FROM model_diagnostics ORDER BY id DESC LIMIT 200)")
-    except Exception:
-        logging.getLogger(__name__).warning("Model diagnostic persistence failed")
-    return safe
-
-
-def recent():
-    with closing(connection()) as conn:
-        return [json.loads(row[0]) for row in conn.execute("SELECT record_json FROM model_diagnostics ORDER BY id")]