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/paramsd.py

@@ -187,7 +187,6 @@ def main():
   avg_offset_valid = True
   total_offset_valid = True
   roll_valid = True
-  dbg_prev_valid = True  # CLEARPILOT: track valid transitions
 
   while True:
     sm.update()
@@ -257,15 +256,7 @@ def main():
         liveParameters.filterState.std = P.tolist()
         liveParameters.filterState.valid = True
 
-      lp_valid = sm.all_checks()
-      # CLEARPILOT: on transition to invalid, log per-subscriber state to paramsd.log
-      if lp_valid != dbg_prev_valid and not lp_valid:
-        import sys
-        bad = [s for s in sm.alive if not (sm.alive[s] and sm.valid[s] and sm.freq_ok.get(s, True))]
-        details = [f"{s}(a={sm.alive[s]},v={sm.valid[s]},f={sm.freq_ok[s]})" for s in bad]
-        print(f"CLP liveParameters valid=False: {' '.join(details)}", file=sys.stderr, flush=True)
-      dbg_prev_valid = lp_valid
-      msg.valid = lp_valid
+      msg.valid = sm.all_checks()
 
       if sm.frame % 1200 == 0:  # once a minute
         params = {