Implement Pravda: Truth Social to Discord relay service

- Add core modules: database (SQLite), media (ffmpeg), discord (webhook), poller (truthbrush), server (FastAPI)
- Support video transcoding to H.264/AAC with automatic size management
- Handle message splitting for Discord limits (2000 chars, 10 attachments)
- Include interactive buttons (Delete, View Raw, Original Post)
- Add Dockerfile with ffmpeg and entrypoint script
- Add Gitea Actions workflow for CI/CD
- Configure code style tools (black, ruff, mypy)
- Include basic unit tests

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

main.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+"""
+Pravda - Truth Social to Discord relay service.
+
+This is the main entrypoint that runs both the poller and the FastAPI server.
+"""
+
+import multiprocessing
+import sys
+
+import uvicorn
+
+from src.poller import fetch_and_relay_post, poll_loop
+from src.server import app
+
+
+def run_server() -> None:
+    """Run the FastAPI server."""
+    uvicorn.run(app, host="0.0.0.0", port=8080, log_level="info")
+
+
+def run_poller() -> None:
+    """Run the polling loop."""
+    poll_loop()
+
+
+def daemon_mode() -> None:
+    """Run both the poller and server concurrently."""
+    print("Starting Pravda in daemon mode...")
+
+    # Start server in a separate process
+    server_process = multiprocessing.Process(target=run_server, name="server")
+    server_process.start()
+
+    # Run poller in the main process
+    try:
+        run_poller()
+    except KeyboardInterrupt:
+        print("\nShutting down...")
+    finally:
+        server_process.terminate()
+        server_process.join(timeout=5)
+
+
+def oneoff_mode(url: str) -> int:
+    """Relay a single post by URL."""
+    print(f"One-off mode: relaying {url}")
+    success = fetch_and_relay_post(url)
+    return 0 if success else 1
+
+
+def main() -> int:
+    """Main entrypoint."""
+    if len(sys.argv) > 1:
+        # One-off mode: relay a specific post
+        url = sys.argv[1]
+        return oneoff_mode(url)
+    else:
+        # Daemon mode: run poller + server
+        daemon_mode()
+        return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())