chore: pin deps to production versions, replace toml with tomllib

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/config.py

@@ -1,5 +1,5 @@
 # app/config.py
-import toml
+import tomllib
 import os
 from pathlib import Path
 from dataclasses import dataclass, field
@@ -83,8 +83,8 @@ class Config:
         config = cls()
         
         if config_path.exists():
-            with open(config_path, "r") as f:
-                data = toml.load(f)
+            with open(config_path, "rb") as f:
+                data = tomllib.load(f)
             
             if "general" in data:
                 config.ollama_host = data["general"].get("ollama_host", config.ollama_host)

requirements.txt

@@ -1,11 +1,11 @@
-fastapi>=0.104.0
-uvicorn[standard]>=0.24.0
-httpx>=0.25.0
-qdrant-client>=1.6.0
-ollama>=0.1.0
-toml>=0.10.2
-tiktoken>=0.5.0
-apscheduler>=3.10.0
-pytest>=7.0.0
-pytest-asyncio>=0.21.0
-pytest-cov>=4.0.0
+fastapi==0.135.2
+uvicorn[standard]==0.42.0
+httpx==0.28.1
+qdrant-client==1.17.1
+ollama==0.6.1
+tiktoken==0.12.0
+apscheduler==3.11.2
+portalocker==3.2.0
+pytest==9.0.2
+pytest-asyncio==1.3.0
+pytest-cov==7.1.0