adopt modelrevert tree as the new clearpilot baseline

Replaces clearpilot's working state wholesale with the modelrevert branch's
tree (modelrevert tip cea422b). Discards the parked-controlsd manager-process
split and the two session READMEs that documented it; keeps the simpler
in-process park short-circuits (controlsd state_control, plannerd, frogpilot_process)
and the cached-output decimation (modeld, dmonitoringmodeld) that achieve
the same goal with less moving parts. Also brings in the locationd GPS
ignore, the calibrationd valid=calStatus gate, and the model-revert lineage's
controlsd / paramsd / torqued / events.py / carstate.py / interfaces.py.

This is a single new commit on clearpilot (no merge), so the branch advances
linearly while the file state matches modelrevert exactly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

selfdrive/locationd/calibrationd.py

@@ -284,7 +284,14 @@ def main() -> NoReturn:
 
     # 4Hz driven by cameraOdometry
     if sm.frame % 5 == 0:
-      calibrator.send_data(pm, sm.all_checks())
+      # CLEARPILOT: publish valid based on calibration status, not upstream sm.all_checks().
+      # The original gate cascaded upstream freq glitches into liveCalibration.valid=False,
+      # which kept locationd.filterInitialized False, which fed garbage into paramsd, which
+      # corrupted steerRatio and caused erratic steering (and controlsd commIssue banners).
+      # "valid" here semantically means "the calibration data is trustworthy" — a question
+      # about convergence, not input freshness.
+      cal_valid = calibrator.cal_status == log.LiveCalibrationData.Status.calibrated
+      calibrator.send_data(pm, cal_valid)
 
 
 if __name__ == "__main__":