feat!: migrate to OpenAI native tool calls and fix circular deps (#fuck-gemini)

- Fix circular dependencies in agent/tools
- Migrate from custom JSON to OpenAI tool calls format
- Add async streaming (step_stream, complete_stream)
- Simplify prompt system and remove token counting
- Add 5 new API endpoints (/health, /v1/models, /api/memory/*)
- Add 3 new tools (get_torrent_by_index, add_torrent_by_index, set_language)
- Fix all 500 tests and add coverage config (80% threshold)
- Add comprehensive docs (README, pytest guide)

BREAKING: LLM interface changed, memory injection via get_memory()

application/movies/dto.py

@@ -1,26 +1,27 @@
 """Movie application DTOs."""
+
 from dataclasses import dataclass
-from typing import Optional
 
 
 @dataclass
 class SearchMovieResponse:
     """Response from searching for a movie."""
+
     status: str
-    imdb_id: Optional[str] = None
-    title: Optional[str] = None
-    media_type: Optional[str] = None
-    tmdb_id: Optional[int] = None
-    overview: Optional[str] = None
-    release_date: Optional[str] = None
-    vote_average: Optional[float] = None
-    error: Optional[str] = None
-    message: Optional[str] = None
-    
+    imdb_id: str | None = None
+    title: str | None = None
+    media_type: str | None = None
+    tmdb_id: int | None = None
+    overview: str | None = None
+    release_date: str | None = None
+    vote_average: float | None = None
+    error: str | None = None
+    message: str | None = None
+
     def to_dict(self):
         """Convert to dict for agent compatibility."""
         result = {"status": self.status}
-        
+
         if self.error:
             result["error"] = self.error
             result["message"] = self.message
@@ -39,5 +40,5 @@ class SearchMovieResponse:
                 result["release_date"] = self.release_date
             if self.vote_average:
                 result["vote_average"] = self.vote_average
-        
+
         return result