feat(server): integrate UDP video service and normalize database schema

- Implement UDPVideoService to stream MJPEG video frames from ESP32s via UDP and send control commands.
- Normalize race database schema:
  - Remove redundant driver_ids array from races table (migration 011).
  - Move per-driver outcomes (total_time_ms, best_lap_ms, position) to race_drivers table (migration 012).
  - Add device_id column to lobby_drivers to link active physical devices (migration 013).
- Update WebSocket handler to pass lobbySvc, driversSvc, and videoSvc for driver identity tracking, syncing in-memory driver metadata, and forwarding WS controls to physical cars.
- Add CORS middleware to HTTP routes.
- Regenerate Swagger documentation.

server/docs/swagger.yaml

@@ -1331,6 +1331,50 @@ paths:
       summary: Get / update / delete a driver by id
       tags:
       - drivers
+  /api/drivers/{id}/device:
+    put:
+      description: Dispatches on HTTP method. Path `/api/drivers/by-nick/{nick}` is
+        a convenience that returns the driver by 3-letter nickname.
+      parameters:
+      - description: Driver id
+        in: path
+        name: id
+        required: true
+        type: string
+      - description: Patch payload (only for PUT)
+        in: body
+        name: driver
+        schema:
+          $ref: '#/definitions/transport.DriverUpdateRequest'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Driver payload or update result
+          schema:
+            $ref: '#/definitions/transport.Driver'
+        "204":
+          description: Delete ack
+          schema:
+            $ref: '#/definitions/transport.Driver'
+        "400":
+          description: Bad request
+          schema:
+            additionalProperties: true
+            type: object
+        "404":
+          description: Driver not found
+          schema:
+            additionalProperties: true
+            type: object
+        "500":
+          description: Internal server error
+          schema:
+            additionalProperties: true
+            type: object
+      summary: Get / update / delete a driver by id
+      tags:
+      - drivers
   /api/races:
     get:
       description: |-
@@ -1850,6 +1894,58 @@ paths:
       summary: Get / update / delete a track by id
       tags:
       - tracks
+  /api/video/control:
+    post:
+      description: Sends a text command (e.g. start, stop, left, right) to the ESP32
+        command port (UDP 8888).
+      parameters:
+      - description: Device ID (0..127)
+        in: query
+        name: id
+        type: integer
+      - description: Command text
+        in: query
+        name: cmd
+        required: true
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Command sent
+          schema:
+            additionalProperties: true
+            type: object
+        "400":
+          description: Missing cmd parameter
+          schema:
+            type: string
+        "500":
+          description: Internal error
+          schema:
+            type: string
+      summary: Send command to ESP32
+      tags:
+      - video
+  /api/video/stream:
+    get:
+      description: Streams video frames received via UDP as multipart/x-mixed-replace.
+        Suitable for raw img tags in browser.
+      parameters:
+      - description: Device ID (0..127)
+        in: query
+        name: id
+        type: integer
+      produces:
+      - multipart/x-mixed-replace
+      responses:
+        "200":
+          description: MJPEG stream
+          schema:
+            type: string
+      summary: Get MJPEG video stream from ESP32
+      tags:
+      - video
   /health:
     get:
       description: Returns 200 OK with current engine phase, WS connection count and