Close finite remote database connections

[apple-ouyang]

Summary

• close caller-owned remote PouchDB handles after finite replication, Security Seed refreshes, maintenance operations, and status queries
• close continuous replication handles before retry or resurrection
• close handles created by RemoteService.connect() when info() fails without replacing the original result

Verification

• Commonlib: 1,300 unit tests, 7 boundary tests, 20 release tests, package build, and 6 managed integration tests
• Self-hosted LiveSync 1.0.13: 638 unit tests, npm run check, and npm run build

[apple-ouyang]

Rebased on current main and expanded the fix to all finite remote-database owners, including connection setup failures and continuous retry/resurrection hand-off. Full Commonlib and downstream LiveSync verification passed.

[vrtmrz]

Thank you very much. This is an excellent improvement!
Just one small clarification: I believe 'all finite owners' here means 'all finite owners within Commonlib'. That scope is entirely appropriate for a Commonlib pull request, but I wanted to note it explicitly.

I am very pleased that we can merge your contribution!