ogTracker: add rolling PCA tracking app, cbuff stream compatible

[edenacadia]

This work was partially done by GPT-5.3-Codex in response to the prompt: "Implement ogTracker patterned after strehlEstimator to read aol1_imWFS2, load PCA calibrations based on tweeterSpeck sparkle parameters, compute rolling PCA RMS metrics normalized by ref_rms, and harden runtime behavior/logging."
Additional prompts include: "Move rolling PCA statistics in ogTracker from the internal Eigen ring (m_ringFrames) to a modalPSDs-style pointer circular buffer that stores curr_src frame pointers from aol1_imWFS2_cbuff."

Summary

• Add the new ogTracker MagAO-X app and integrate it into the top-level build.
• Implement rolling PCA tracking on the aol1_imWFS2_cbuff stream, including calibration lookup from live tweeterSpeck parameters, normalized OG metrics, running averages, and telemetry/INDI publication.
• Add unit tests for deterministic helper behavior in ogTracker, and update test Doxygen grouping so the application tests follow current repository documentation rules.

Affected Files

• Makefile
• apps/ogTracker/Makefile
• apps/ogTracker/ogTracker.cpp
• apps/ogTracker/ogTracker.hpp
• apps/ogTracker/tests/ogTracker_test.cpp
• tests/groups.dox

Test Plan

• Build ogTracker in the MagAO-X environment.
• Run the ogTracker unit test target that includes apps/ogTracker/tests/ogTracker_test.cpp.
• Perform a runtime test with a live aol1_imWFS2_cbuff stream, verify calib_*, pca_og, pca_og_avg, and og_summary update as expected.
• Verify calibration refresh behavior when tweeterSpeck separation, angle, amplitude, frequency, or modulation state changes.

Follow-up / Edge Cases

• Confirm the configured calibration root matches the deployment environment.
• Confirm the current og_summary definition and publication semantics match downstream expectations.