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>

.gitea/workflows/build-push.yaml

@@ -0,0 +1,42 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Login to Gitea Registry
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.stevedudenhoeffer.com
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract branch name
+        id: branch
+        run: echo "name=${GITHUB_REF_NAME:-${{ gitea.ref_name }}}" >> $GITHUB_OUTPUT
+
+      - name: Build and push (branch tag)
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: gitea.stevedudenhoeffer.com/steve/pravda:${{ steps.branch.outputs.name }}
+
+      - name: Build and push (latest tag)
+        if: steps.branch.outputs.name == 'main'
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: gitea.stevedudenhoeffer.com/steve/pravda:latest