GPS fix + log directory redesign + dashcamd binary

GPS: fix AT response parsing (strip mmcli `response: '...'` wrapper),
fix capnp field names (horizontalAccuracy, hasFix), set system clock
directly from first GPS fix when time is invalid, kill system gpsd on
startup.

Logging: replace module-level log dir creation with init_log_dir()
called from manager_init(). Active session always at /data/log2/current
(real dir until time resolves, then symlink to timestamped dir). Add
LogDirInitialized param. Redirect both stdout+stderr for all processes.

Also: thorough process cleanup in launch scripts, dashcamd binary,
CLAUDE.md updates for GPS/telemetry/bench/logging docs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

selfdrive/manager/manager.py

@@ -16,7 +16,7 @@ from openpilot.common.text_window import TextWindow
 from openpilot.common.time import system_time_valid
 from openpilot.system.hardware import HARDWARE, PC
 from openpilot.selfdrive.manager.helpers import unblock_stdout, write_onroad_params, save_bootlog
-from openpilot.selfdrive.manager.process import ensure_running, update_log_dir_timestamp, session_log
+from openpilot.selfdrive.manager.process import ensure_running, init_log_dir, update_log_dir_timestamp, session_log
 from openpilot.selfdrive.manager.process_config import managed_processes
 from openpilot.selfdrive.athena.registration import register, UNREGISTERED_DONGLE_ID
 from openpilot.common.swaglog import cloudlog, add_file_handler
@@ -59,6 +59,8 @@ def cleanup_old_logs(max_age_days=30):
     return
   cutoff = time.time() - (max_age_days * 86400)
   for entry in os.listdir(log_base):
+    if entry == "current":
+      continue
     path = os.path.join(log_base, entry)
     if os.path.isdir(path):
       if os.path.getmtime(path) < cutoff:
@@ -69,6 +71,7 @@ def cleanup_old_logs(max_age_days=30):
 
 
 def manager_init(frogpilot_functions) -> None:
+  init_log_dir()
   cleanup_old_logs()
 
   frogpilot_boot = threading.Thread(target=frogpilot_boot_functions, args=(frogpilot_functions,))