Resume timer after pause

bin/cleanup-smartcam-data

@@ -9,11 +9,11 @@ STATE_DIR="/var/lib/cleanup-smartcam-data"
 PAUSED_STATE="${STATE_DIR}/capture-paused"
 LOCK_FILE="/run/cleanup-smartcam-data.lock"
 
-# Start deleting confirmed bundles below 15 GiB, pause capture below 8 GiB,
-# and resume only after the filesystem has recovered to 15 GiB.
-CLEAN_TARGET_BYTES="${CLEAN_TARGET_BYTES:-16106127360}"
-PAUSE_BELOW_BYTES="${PAUSE_BELOW_BYTES:-8589934592}"
-CRITICAL_BELOW_BYTES="${CRITICAL_BELOW_BYTES:-5368709120}"
+# Start deleting confirmed bundles below 10 GiB, pause capture below 5 GiB,
+# raise a critical alert below 3 GiB, and resume after recovery to 10 GiB.
+CLEAN_TARGET_BYTES="${CLEAN_TARGET_BYTES:-10737418240}"
+PAUSE_BELOW_BYTES="${PAUSE_BELOW_BYTES:-5368709120}"
+CRITICAL_BELOW_BYTES="${CRITICAL_BELOW_BYTES:-3221225472}"
 MIN_FILE_AGE_MINUTES="${MIN_FILE_AGE_MINUTES:-60}"
 SAFE_WINDOW_SECONDS="${SAFE_WINDOW_SECONDS:-10}"
 
@@ -70,6 +70,15 @@ camera_is_stopped() {
   ps -o stat= -p "$pid" 2>/dev/null | grep -q '^T'
 }
 
+start_fast_resume_checks() {
+  systemctl start cleanup-smartcam-data-resume.timer 2>/dev/null ||
+    log ERROR "failed to start fast resume checks"
+}
+
+stop_fast_resume_checks() {
+  systemctl --no-block stop cleanup-smartcam-data-resume.timer 2>/dev/null || true
+}
+
 wait_for_safe_window() {
   local newest size1 size2
   newest="$(find "$DATA_ROOT/videos_raw" -maxdepth 1 -type f -name '*.mp4' \
@@ -91,6 +100,7 @@ pause_capture() {
   fi
   if camera_is_stopped "$pid"; then
     printf 'pid=%s\npaused_at=%s\n' "$pid" "$(date --iso-8601=seconds)" > "$PAUSED_STATE"
+    start_fast_resume_checks
     return 0
   fi
 
@@ -99,6 +109,7 @@ pause_capture() {
   fi
   kill -STOP "$pid"
   printf 'pid=%s\npaused_at=%s\n' "$pid" "$(date --iso-8601=seconds)" > "$PAUSED_STATE"
+  start_fast_resume_checks
   alert CRITICAL "capture paused at free=$(human_bytes "$free_bytes"); SFTP/Kafka uploader remains running; automatic resume target=$(human_bytes "$CLEAN_TARGET_BYTES")"
 }
 
@@ -110,16 +121,19 @@ resume_capture_if_ready() {
   if ! valid_camera_pid "$pid"; then
     log WARNING "discarding stale capture pause state (pid=${pid:-unknown})"
     rm -f "$PAUSED_STATE"
+    stop_fast_resume_checks
     return 0
   fi
   if ! camera_is_stopped "$pid"; then
     log WARNING "capture is already running; clearing stale pause state"
     rm -f "$PAUSED_STATE"
+    stop_fast_resume_checks
     return 0
   fi
   if [[ "$free_bytes" -ge "$CLEAN_TARGET_BYTES" ]]; then
     kill -CONT "$pid"
     rm -f "$PAUSED_STATE"
+    stop_fast_resume_checks
     alert RECOVERED "free space reached $(human_bytes "$free_bytes"); capture resumed automatically"
   else
     log WARNING "capture remains paused: free=$(human_bytes "$free_bytes"), resume target=$(human_bytes "$CLEAN_TARGET_BYTES")"