fix: use dynamic database lookup for search index check

[nirinchev]

Based on #1091 - uses a dynamic list of databases to check for search index support instead of the hardcoded #mongodb-mcp which may not be accessible for the db user.

Fixes #1022

[Copilot]

Pull request overview

This PR updates Atlas Search capability detection to avoid relying on a single hardcoded probe database, improving compatibility with users whose connection string/roles restrict database access (Issue #1022).

Changes:

• Update ConnectionStateConnected.isSearchSupported() to probe multiple candidate databases (initial DB + listDatabases() results + fallback) and treat SearchNotEnabled as the definitive “not supported” signal.
• Add logging for the search capability probe and thread a logger through Session.isSearchSupported().
• Expand unit/integration test coverage, including spinning up auth-enabled MongoDB test clusters with multiple users and restricted privileges.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/common/connectionManager.ts	Implements the new multi-database probe logic and caches the probe result.
src/common/session.ts	Passes the session logger into the connected state’s isSearchSupported() call.
src/common/logging/loggingDefinitions.ts	Adds a new log ID for probe-related debug logging.
tests/unit/common/session.test.ts	Updates mocks and assertions for the new probe behavior and error handling.
tests/integration/common/connectionManager.test.ts	Adds integration coverage for probe candidate selection, failure modes, and caching.
tests/integration/tools/mongodb/mongodbHelpers.ts	Adds a helper to build per-user connection strings for restricted-user scenarios.
tests/integration/tools/mongodb/mongodbClusterProcess.ts	Adds support for creating multiple users on mongo-runner clusters and generating per-user URIs.
api-extractor/reports/web.public.api.md	Updates public API report for the new isSearchSupported(logger) signature.
api-extractor/reports/mongodb-mcp-server.public.api.md	Updates public API report for the new isSearchSupported(logger) signature.

[coveralls]

Coverage Report for CI Build 24860576670

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Coverage: 81.942%

Details

• Patch coverage: 37 of 37 lines across 2 files are fully covered (100%).

Uncovered Changes

No uncovered changes found.

Coverage Regressions

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Coverage Stats

Relevant Lines:	3609
Covered Lines:	3147
Line Coverage:	87.2%
Relevant Branches:	2261
Covered Branches:	1663
Branch Coverage:	73.55%
Branches in Coverage %:	Yes
Coverage Strength:	175.62 hits per line

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💛 - Coveralls

[Will-hxw]

I opened #1097 as a small compatibility patch on top of this branch. It keeps ConnectionStateConnected.isSearchSupported() callable without a logger by falling back to NullLogger, updates the API reports, and adds a focused unit test for the direct no-argument call path.