feat(client): v0.3.0 server compat — WS subprotocol auth, 429 retry, HTTPS, X-Request-ID

Aligns the integration with the four wire-level changes shipped in
media-server v0.3.0/0.3.1 without breaking back-compat with older
server versions or pre-existing config entries.

- WebSocket auth via Sec-WebSocket-Protocol: media-server.token.<T>
  (preferred by server v0.3.0+). The ?token= query is still sent so
  older servers and unauthenticated mode both keep working — aiohttp
  completes the handshake even when the server doesn't echo the
  subprotocol back.
- 429 Too Many Requests surfaced as MediaServerRateLimitError with
  Retry-After parsed; execute_script() sleeps min(retry_after, 30)
  and retries once before falling through to the caller.
- Optional HTTPS/WSS (CONF_USE_SSL) + optional certificate verification
  toggle (CONF_VERIFY_SSL) wired through the config flow, client, and
  WebSocket. Defaults preserve http+verified behaviour, so existing
  config entries are unchanged.
- X-Request-ID header (uuid4 hex) on every HTTP call so HA-side issues
  can be cross-referenced with the server's access/audit logs. The
  format matches the server's ^[A-Za-z0-9._-]{1,128}\$ allow-list so
  the id is preserved verbatim instead of being replaced server-side.

Bumps manifest version to 0.3.3.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

custom_components/remote_media_player/strings.json

@@ -8,6 +8,8 @@
           "host": "Host",
           "port": "Port",
           "token": "API Token",
+          "use_ssl": "Use HTTPS",
+          "verify_ssl": "Verify TLS certificate",
           "name": "Name",
           "poll_interval": "Poll Interval"
         },
@@ -15,6 +17,8 @@
           "host": "Hostname or IP address of the Media Server",
           "port": "Port number (default: 8765)",
           "token": "API authentication token from the server configuration. Leave blank if the server runs without authentication.",
+          "use_ssl": "Talk to the server over HTTPS/WSS. The server must be configured with ssl_certfile and ssl_keyfile in config.yaml.",
+          "verify_ssl": "Verify the server's TLS certificate chain. Turn off only if the server uses a self-signed certificate on a trusted LAN.",
           "name": "Display name for this media player",
           "poll_interval": "How often to poll for status updates (seconds)"
         }