fix: pre-liberation review — frames dir, wigle config GET, debug redis-keys endpoint

CRITICAL:
- frames.py: FRAMES_DIR corrected to /tmp/adacam/pics
- frames.py: graceful handling when capture not started

IMPORTANT:
- wigle.py: added GET /api/1/wigle/config endpoint for Varroa
- app.py: added GET /api/1/debug/redis-keys endpoint for GPS troubleshooting
- install.sh: removed python validation that runs from wrong directory

adacam_api/app.py

@@ -110,6 +110,18 @@ def create_app():
         )
         return jsonify({'ok': True, 'ssh_enabled': enable})
     
+    # ── DEBUG ENDPOINTS ────────────────────────────────────────────────────
+    @app.route('/api/1/debug/redis-keys')
+    def redis_keys():
+        """Debug endpoint — list Redis keys for GPS/IMU troubleshooting."""
+        try:
+            import redis
+            r = redis.Redis(host='localhost', port=6379, decode_responses=True)
+            keys = r.keys('*')
+            return jsonify({'keys': sorted(keys)})
+        except Exception as e:
+            return jsonify({'error': str(e)}), 503
+    
     # Start background forwarder thread
     forwarder.start_retry_thread()