fix(mongodb-schema): follow up migration with small bug fixes COMPASS-10911

[dudaschar]

Description

Tackling code review suggestions from PR #842, also bringing mongodb-schema version to be same as last published package.

Open Questions

Checklist

• I have signed the Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)
• New tests and/or benchmarks are included
• Documentation is changed or added

[Copilot]

Pull request overview

This PR follows up on the mongodb-schema migration work by aligning the in-repo package version with the last published @mongodb-js/mongodb-schema release, and fixing a handful of correctness issues in schema conversion/ordering and TypeScript type generation.

Changes:

• Bump @mongodb-js/mongodb-schema from 0.2.0 to 12.7.0 across the monorepo (and update lockfile accordingly).
• Fix TypeScript generation correctness (array union parentheses + quoting non-identifier field names) and add a syntax-validity check in tests.
• Improve abort-signal handling during schema analysis and add coverage for stable ordering when keys differ only by case.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/mql-typescript/package.json	Updates devDependency on @mongodb-js/mongodb-schema to ^12.7.0.
packages/mongodb-ts-autocomplete/package.json	Updates dependency on @mongodb-js/mongodb-schema to ^12.7.0.
packages/mongodb-schema/test/field-order.test.ts	Adds regression test ensuring stable ordering for case-differing keys.
packages/mongodb-schema/test/bloated.test.ts	Adds abort-signal behavior tests for SchemaAnalyzer.analyzeDoc().
packages/mongodb-schema/src/to-typescript.ts	Fixes array union formatting and quotes invalid TS property keys.
packages/mongodb-schema/src/to-typescript.spec.ts	Adds a TypeScript parse/transpile-based validity check and expands coverage for quoted field names.
packages/mongodb-schema/src/schema-converters/internal-to-mongodb.ts	Propagates AbortSignal through array item parsing.
packages/mongodb-schema/src/schema-analyzer.ts	Makes comparator stable for case-insensitive equal keys; ensures abort checks actually propagate by awaiting allowAbort(signal).
packages/mongodb-schema/package.json	Bumps package version to 12.7.0.
package-lock.json	Locks updated versions for the bumped package and its consumers.

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