Modernize query planner: use Object.values instead of manual mapping

[MOHITKOURAV01]

Modernize Query Planner: Replace manual mapping with Object.values

This PR modernizes the shouldShortCircuit function in the pouchdb-find query planner. It resolves a legacy @todo comment by replacing a manual iteration over Object.keys with the native Object.values() method.

Rationale

• Code Clarity: Object.values() is more concise and directly expresses the intent of gathering all selector values.
• Modern Standards: The codebase already uses Object.values() in other core modules, making this change consistent with current project standards.
• Tech Debt: Removes an old Node.js v6 compatibility workaround that is no longer necessary.

Changes

• Modified packages/node_modules/pouchdb-find/src/adapters/local/find/query-planner.js
• Removed legacy @todo regarding Node.js v6 support.
• Updated shouldShortCircuit to use Object.values(selector).

Testing Conducted

• Ran npm run test-unit (164/164 passing).
• Ran specialized find tests using TYPE=find ADAPTERS=memory (349/349 passing).
• Verified successful build via npm run build.