[Jmmt-mingrui]

Summary

• persist semantic_enabled and semantic_version per workspace in system_mcp.workspace_metadata
• check the published version on every semantic access and reload before serving a changed version
• expose an English Semantic queries ON/OFF control to every user with the Doris admin role
• report enabled, published, and loaded versions through semantic health responses
• remove the legacy preferred/optional routing documentation
• publish release artifacts as velodb-mcp-server, starting the 0.3.x line at 0.3.0

Testing

• bash test/run_all_tests.sh --offline
• Python compile checks for the changed server and store modules
• release workflow YAML parsing
• git diff --check