[r4venrudy]

ToolQuery.get(2001) can return 4,000 records when enough matches exist: the second 2,000-record page is appended in full. The shared implementation also affects service and variable queries.

Append only the remaining requested records from the final page. Keep page_size fixed across page_num requests, since reducing it would shift page offsets and repeat records. Add a changelog entry and 15 offline cases covering all three query classes, partial and exact page limits, exhausted results, and a zero limit.

Validation on Windows / Python 3.12:

• Before the fix: 6 regression failures and 9 passing controls.
• Full suite after the fix: 144 passed, with outbound socket connections blocked and existing recorded responses replayed.
• mypy cmr tests, the CI fatal-error Flake8 checks, and git diff --check: passed.

The test environment uses the repository-locked requests 2.32.4, urllib3 2.2.3, VCR.py 6.0.1, and mypy 1.11.2. No dependency or fixture changes are included.