Add MEM-QKF batch update mode

[FlorianPfaff]

Summary

• Adds update_mode="sequential"|"batch" to MEMQKFTracker.
• Keeps sequential updates as the default to preserve existing behavior.
• Adds a batch mode that performs one centroid-based kinematic update and then reuses the existing sequential quadratic extent updates.
• Adds focused tests for invalid modes, centroid kinematic behavior, and multi-measurement behavior differences.

Validation

• PYTHONPATH=src python -m pytest tests\filters\test_mem_qkf_tracker.py -> 15 passed
• python -m ruff check src\pyrecest\filters\mem_qkf_tracker.py tests\filters\test_mem_qkf_tracker.py -> passed
• git diff --check -> passed

Note

• Full poetry install --with dev on Windows still fails on optional healpy native build dependencies (cfitsio/pkg-config), unrelated to this MEM-QKF change.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	27.97s
✅ JSON	prettier	2	0	0	0	0.45s
✅ JSON	v8r	2		0	0	2.35s
✅ MARKDOWN	markdownlint	28	0	0	0	1.27s
✅ MARKDOWN	markdown-table-formatter	28	0	0	0	0.34s
✅ PYTHON	bandit	535		0	0	8.4s
✅ PYTHON	black	535	0	0	0	12.12s
✅ PYTHON	flake8	535		0	0	4.49s
✅ PYTHON	isort	535	1	0	0	0.94s
✅ PYTHON	mypy	535		0	0	6.49s
✅ PYTHON	pylint	535		0	0	122.38s
✅ PYTHON	ruff	535	1	0	0	0.08s
✅ REPOSITORY	checkov	yes		no	no	21.15s
✅ REPOSITORY	gitleaks	yes		no	no	9.3s
✅ REPOSITORY	git_diff	yes		no	no	0.03s
✅ REPOSITORY	secretlint	yes		no	no	9.48s
✅ REPOSITORY	syft	yes		no	no	4.49s
✅ REPOSITORY	trivy-sbom	yes		no	no	3.4s
✅ REPOSITORY	trufflehog	yes		no	no	21.64s
✅ YAML	prettier	5	0	0	0	0.45s
✅ YAML	v8r	5		0	0	4.91s
✅ YAML	yamllint	5		0	0	0.53s

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[github-actions]

Test Results

    12 files  +     9      12 suites  +9   2h 24m 35s ⏱️ + 2h 10m 27s
 1 590 tests +     4   1 590 ✅ +     6      0 💤  -     2  0 ❌ ±0 
19 540 runs  +14 602  15 500 ✅ +10 568  4 040 💤 +4 034  0 ❌ ±0 

Results for commit 797acbe. ± Comparison against base commit 8aa7b80.

♻️ This comment has been updated with latest results.