refactor: remove 17-byte FFE4 and 33-byte FFE1 legacy compat code

- Remove parseVendorStatus 17-byte branch (FFE4 is now 19 bytes)
- Remove parseVendorStatus 33-byte branch (FFE1 is now 34 bytes)
- Remove buildVendorCommand33 deprecated alias
- Remove fitting/run_state !== -1 guards in connection.js
- Update commands.js to use buildVendorCommand directly

miniprogram/services/ble/index.js

@@ -43,7 +43,6 @@ module.exports = {
   buildFrame: protocol.buildFrame,
   parseFrame: protocol.parseFrame,
   buildVendorCommand: protocol.buildVendorCommand,
-  buildVendorCommand33: protocol.buildVendorCommand33,
   parseVendorStatus: protocol.parseVendorStatus,
   parseStatusReport: protocol.parseStatusReport,
   parseAck: protocol.parseAck,