fix: report CLI result truncation

[danusha2345]

Fixes #1639.

• callers and callees JSON now include total, limit, and truncated; human output shows shown of total plus a widening hint.
• query fetches one extra result to detect a cut. Its existing bare-array JSON stdout remains unchanged; a truncation notice is emitted on stderr, while human output gets the same notice on stdout.
• Metadata is emitted unconditionally for callers/callees, including truncated: false for complete results.

Tests:

• regression tests failed against the pre-fix build
• npm run build
• focused CLI tests (11 passed)
• npm test (3055 passed, 187 skipped)