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>

README.md

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+# Pravda
+
+A Python-based Dockerized service that monitors Truth Social feeds and relays posts to Discord via webhooks. Features intelligent media handling (transcoding/splitting) and interactive message components.
+
+## Features
+
+- Monitors Truth Social feeds using the `truthbrush` library
+- Relays posts to Discord with full media support
+- Automatic video transcoding to H.264/AAC for Discord compatibility
+- Smart file size management (keeps videos under 50MB)
+- Message splitting for long posts (Discord's 2000 char limit)
+- Interactive buttons for deleting messages and viewing raw post data
+- SQLite database for tracking processed posts
+- FastAPI server for handling Discord interaction webhooks
+
+## Requirements
+
+- Python 3.12+
+- Docker (for containerized deployment)
+- ffmpeg (for video transcoding)
+- A Discord webhook URL
+- A Discord application (for interaction components)
+
+## Environment Variables
+
+| Variable | Description | Required |
+|----------|-------------|----------|
+| `DISCORD_WEBHOOK` | Discord Webhook URL for posting messages | Yes |
+| `DISCORD_APPLICATION_ID` | Discord Application ID for components | Yes |
+| `DISCORD_PUBLIC_KEY` | Public Key for verifying interaction signatures | Yes (if using interactions) |
+| `POLL_INTERVAL` | Seconds between checks (default: 300) | No |
+| `TRUTH_USER` | Target username (default: realDonaldTrump) | No |
+| `DB_PATH` | Path to SQLite DB (default: /data/seen.db) | No |
+
+## Quick Start
+
+### Local Development
+
+```bash
+# Install dependencies
+pip install -r requirements.txt
+
+# Set environment variables
+export DISCORD_WEBHOOK="your_webhook_url"
+export DISCORD_APPLICATION_ID="your_app_id"
+export DISCORD_PUBLIC_KEY="your_public_key"
+
+# Run locally
+python main.py
+```
+
+### Docker
+
+```bash
+# Build image
+docker build -t pravda .
+
+# Run in daemon mode (Poller + Server)
+docker run -d \
+  -e DISCORD_WEBHOOK="your_webhook_url" \
+  -e DISCORD_APPLICATION_ID="your_app_id" \
+  -e DISCORD_PUBLIC_KEY="your_public_key" \
+  -v $(pwd)/data:/data \
+  -p 8080:8080 \
+  pravda
+
+# One-off mode: relay a specific post
+docker run --rm \
+  -e DISCORD_WEBHOOK="your_webhook_url" \
+  pravda https://truthsocial.com/@realDonaldTrump/posts/123456789
+```
+
+## Architecture
+
+The application runs two concurrent processes:
+
+1. **The Poller**: Loops infinitely, checking for new posts. Processed posts are cached in SQLite to prevent duplicates.
+
+2. **The Server**: A FastAPI instance listening on port 8080 to handle Discord interaction webhooks (button clicks).
+
+### Interaction Endpoints
+
+- `POST /interactions` - Discord interaction webhook handler
+- `GET /health` - Health check endpoint
+
+## Discord Components
+
+Messages include interactive buttons:
+
+- **Delete**: Removes the message (requires MANAGE_MESSAGES permission)
+- **View Raw**: Shows the raw post JSON (ephemeral)
+- **Original Post**: Links to the original Truth Social post
+
+## Media Handling
+
+- **Images**: Downloaded and attached directly
+- **Videos**: Transcoded to H.264/AAC MP4 format
+  - Automatically scaled down if over 50MB
+  - Resolution reduced progressively (720p, then 480p) if needed
+
+## Development
+
+```bash
+# Install dev dependencies
+pip install -r requirements.txt
+pip install black ruff mypy pytest
+
+# Format code
+black .
+
+# Lint
+ruff check .
+
+# Type check
+mypy .
+
+# Run tests
+pytest
+```
+
+## Project Structure
+
+```
+pravda/
+├── main.py              # Application entrypoint
+├── src/
+│   ├── __init__.py
+│   ├── database.py      # SQLite operations
+│   ├── discord.py       # Discord webhook handling
+│   ├── media.py         # Media processing (ffmpeg)
+│   ├── poller.py        # Truth Social polling
+│   └── server.py        # FastAPI interaction handler
+├── Dockerfile
+├── entrypoint.sh
+├── requirements.txt
+├── pyproject.toml
+└── .gitea/
+    └── workflows/
+        └── build-push.yaml
+```
+
+## License
+
+MIT