Resolves issue 1934, Reduce Mongoose hydration for read-only queries

[Ewgna]

Closes Issue #1934

Summary

Adds .lean() to high confidence read-only Mongoose queries to reduce hydration CPU/memory overhead,Write paths that mutate documents or call Mongoose document methods unchanged(remain hydrated)

Important Changes

src/repositories/baseRepository.js

• Updated find() so lean and limit can be applied together.
• Preserved the existing count-query behavior.

Repository query paths:

• Added lean CVE and CVE-ID lookups
• Added lean projected queries for CVE-ID organization and user maps
• Added lean reads for conversations, review objects, audits, and glossary data
• Added lean projected reads for organization/user expansion, membership, role, collision, and existence checks
• Kept shared organization and user lookup methods hydrated for default
• Enabled opt-in lean organization lookups for the registry and legacy organization detail response paths
• Preserved conversation visibility filtering and Secretariat author redaction

Registry and legacy organization responses:

• Lean queries because of no hydration do not provide empty-arr [] defaults, so restored said arrays
• Added separate registry and legacy normalization paths
• Preserved legacy authority.active_roles objects without replacement
• Did not include registry-only fields into legacy responses

Testing

Focused repository and upstream contract coverage:

• Verified BaseRepository.find() combines limit and lean
• Verified converted queries execute as lean queries
• Verified write-oriented shared lookups remain hydrated by default
• Verified non-sequential CVE-ID reservation through the endpoint
• Verified authenticated organization CVE-ID filtering
• Verified conversation visibility and author UUID redaction
• Verified registry and legacy sparse organization endpoint responses
• Verified review object, audit, glossary, CVE, CVE-ID, user, and organization query behavior

Example cmd:

docker compose exec cveawg npx mocha test/unit-tests/repository/baseRepositoryLeanTest.js test/unit-tests/repository/leanRepositoryQueriesTest.js test/unit-tests/conversation/conversationRepositoryTest.js test/unit-tests/cve-id/cveIdGetAllTest.js test/unit-tests/org/baseOrgRepositoryTest.js --exit