chore: adds field embeddings validation for quantization "none" and warn when vectorSearch is not configured correctly

[himanshusinghs]

Proposed changes

Proposes the following:

1. Modifies the description of createIndex tool's index definition object. We will mention vectorSearch only when the feature is enabled. Additionally adds additional tests for the metadata - 198b36e
2. Adds validation for document field embeddings when the index quantization is set to none - 5cd2e51
3. Adds a warning when vector search is not correctly configured - fbb3d0f

Checklist

• I have signed the MongoDB CLA

[coveralls]

Pull Request Test Coverage Report for Build 19171504420

Details

• 32 of 38 (84.21%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.05%) to 80.106%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/common/config.ts	11	17	64.71%

Files with Coverage Reduction	New Missed Lines	%
src/common/search/vectorSearchEmbeddingsManager.ts	1	83.89%

Totals
Change from base Build 19133495784:	-0.05%
Covered Lines:	6503
Relevant Lines:	8004

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💛 - Coveralls

[Copilot]

Pull Request Overview

This PR enhances vector search configuration validation and improves tool metadata clarity. The main purpose is to ensure proper vector search setup and provide better user feedback when configurations are incorrect.

Key changes:

• Adds validation for embeddings when quantization is set to "none"
• Introduces warnings when vector search feature and embeddings provider configurations are mismatched
• Updates warning message formatting for better readability

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/common/search/vectorSearchEmbeddingsManager.ts	Implements validation logic for "none" quantization to ensure embeddings are proper numeric arrays with correct dimensions
src/common/config.ts	Adds configuration validation warnings for vector search/embeddings provider mismatches and updates warning message formatting
src/tools/mongodb/create/createIndex.ts	Makes vectorSearch reference conditional in tool description based on feature availability
tests/unit/common/search/vectorSearchEmbeddingsManager.test.ts	Extends test coverage to validate "none" quantization handling across multiple scenarios
tests/unit/common/config.test.ts	Updates test expectations to match new warning message format
tests/integration/tools/mongodb/create/createIndex.test.ts	Adds metadata validation and updates expected description text
tests/integration/tools/mongodb/create/insertMany.test.ts	Adds metadata validation test for insert-many tool