Add manifold exponential moving average

[FlorianPfaff]

Summary

Adds ManifoldExponentialMovingAverage, a generic exponential moving average filter for manifold-valued samples. The update moves the current estimate toward each new sample in the local tangent space using the same phi / phi_inv retraction convention used by UKFOnManifolds.

The class supports initializing from an explicit initial state or from the first observed sample, validates the EMA weight, exposes the current estimate through filter_state and get_point_estimate, and is exported from pyrecest.filters.

Tests

• PYTHONPATH=src python -m pytest tests/filters/test_manifold_exponential_moving_average.py tests/filters/test_ukf_on_manifolds.py -q
• PYTHONPATH=src python -m pytest tests/filters -q timed out after 5 minutes in the local environment without producing a failure report.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
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✅ MARKDOWN	markdownlint	7	0	0	0	0.97s
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✅ PYTHON	mypy	419		0	0	5.51s
✅ PYTHON	pylint	419		0	0	120.0s
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✅ REPOSITORY	checkov	yes		no	no	12.05s
✅ REPOSITORY	gitleaks	yes		no	no	7.23s
✅ REPOSITORY	git_diff	yes		no	no	0.12s
✅ REPOSITORY	secretlint	yes		no	no	4.39s
✅ REPOSITORY	syft	yes		no	no	3.32s
✅ REPOSITORY	trivy-sbom	yes		no	no	2.13s
✅ REPOSITORY	trufflehog	yes		no	no	15.19s
✅ YAML	prettier	4	0	0	0	0.48s
✅ YAML	v8r	4		0	0	40.27s
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[github-actions]

Test Results

    12 files      12 suites   4h 37m 2s ⏱️
 1 182 tests  1 182 ✅     0 💤 0 ❌
14 548 runs  11 032 ✅ 3 516 💤 0 ❌

Results for commit fd79cc3.