Document connector improvements in v25.1 release notes

[qodo-code-review]

Description

• Four connector-related bug fixes and improvements need to be documented in the v25.1 release notes
• These fixes address error handling, query functionality, state management, and logging issues
• Release notes should be updated to inform users of these improvements

Deliverables

• Error Clearing: Document that connector error details are now cleared on successful recovery or stop
• Query Support: Document that connector listing now uses query parameters instead of request body, with pagination bug fix
• State Recording: Document that connector state correctly records as deactivated when activation fails
• Logging Fix: Document resolution of invalid operation exception in gRPC connector service communication

[linear]

DB-1752