revert modeld/controlsd/plannerd/locationd to first-commit baseline

Starting point for rebuilding self-drive from a known-good baseline.
Reverts the following to their state at f46339c:
- selfdrive/modeld/modeld.py (constant 20fps, no variable-rate / standby skip)
- selfdrive/modeld/dmonitoringmodeld.py (no carState sub, no standstill skip)
- selfdrive/controls/controlsd.py (no parked-cycle skip, no FPCC hoisting, no MDPS split)
- selfdrive/controls/lib/longitudinal_planner.py
- selfdrive/locationd/calibrationd.py (valid = sm.all_checks again)
- selfdrive/locationd/paramsd.py
- selfdrive/locationd/torqued.py

All non-self-drive features (thermald fan control, speed limit controller,
cruise warning signs, UI state transitions, GPS fixes, ClearPilot menu,
dashcamd, telemetry, etc.) remain as-is on this branch — only the 4 core
self-drive processes are reverted.

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

selfdrive/locationd/calibrationd.py

@@ -284,14 +284,7 @@ def main() -> NoReturn:
 
     # 4Hz driven by cameraOdometry
     if sm.frame % 5 == 0:
-      # CLEARPILOT: publish valid based on calibration status, not upstream sm.all_checks().
-      # Original openpilot gated valid on fresh inputs, but that caused a cascade:
-      # upstream freq glitches → liveCalibration.valid=False → locationd stays
-      # uninitialized → paramsd fed garbage → bogus steerRatio/stiffnessFactor → erratic
-      # steering. "valid" semantically means "calibration data is trustworthy"; that's a
-      # question about calibration convergence, not input freshness.
-      cal_valid = calibrator.cal_status == log.LiveCalibrationData.Status.calibrated
-      calibrator.send_data(pm, cal_valid)
+      calibrator.send_data(pm, sm.all_checks())
 
 
 if __name__ == "__main__":