Remove deprecated files and scripts to streamline the codebase

- Deleted unused API test files, RTSP diagnostic scripts, and development utility scripts to reduce clutter.
- Removed outdated database schema and modularization proposal documents to maintain focus on current architecture.
- Cleaned up configuration files and logging scripts that are no longer in use, enhancing project maintainability.

docs/rtsp_access_guide.md

@@ -0,0 +1,72 @@
+# RTSP Streaming Access Guide (Tailscale)
+
+## Your Tailscale IP
+**100.93.40.84**
+
+## Access URLs
+
+Replace `exp-dash` with `100.93.40.84` in all URLs when accessing from outside the VM.
+
+### 1. MediaMTX Web Interface (Best for Testing)
+```
+http://100.93.40.84:8889/static/
+```
+This shows all available streams with a built-in player.
+
+### 2. Direct WebRTC Player for Camera1
+```
+http://100.93.40.84:8889/camera1/webrtc
+```
+This is a browser-based player that works without VLC.
+
+### 3. RTSP URL (for VLC/ffplay)
+```
+rtsp://100.93.40.84:8554/camera1
+```
+
+**For VLC:**
+- File → Open Network Stream
+- URL: `rtsp://100.93.40.84:8554/camera1`
+- Or use: `rtsp://100.93.40.84:8554/camera1?transport=tcp`
+
+**For ffplay:**
+```bash
+ffplay -rtsp_transport tcp rtsp://100.93.40.84:8554/camera1
+```
+
+## Important Notes
+
+1. **Stream Timeout**: MediaMTX closes streams after ~10 seconds if no one is watching. Make sure to:
+   - Start RTSP first: `curl -X POST http://exp-dash:8000/cameras/camera1/start-rtsp`
+   - Then quickly open the viewer within 10 seconds
+
+2. **Ports Exposed**:
+   - 8554: RTSP
+   - 8889: WebRTC/HTTP API
+   - 8189: WebRTC UDP
+
+3. **Network**: Tailscale creates a VPN, so you can access these URLs from anywhere, as long as your client device is also on the same Tailscale network.
+
+## Testing Steps
+
+1. **Start the stream:**
+   ```bash
+   curl -X POST http://exp-dash:8000/cameras/camera1/start-rtsp
+   ```
+
+2. **Quickly open a viewer** (within 10 seconds):
+   - Open browser: `http://100.93.40.84:8889/static/`
+   - Or: `http://100.93.40.84:8889/camera1/webrtc`
+
+3. **Check status:**
+   ```bash
+   ./check_rtsp_status.sh
+   ```
+
+## Troubleshooting
+
+If you see "no stream is available":
+- The stream might have timed out (waited >10 seconds without viewer)
+- Restart the stream and quickly connect
+- Check logs: `docker compose logs api --tail 20 | grep RTSP`
+