fix(recovery): capture reboot lessons and gitea backup coverage

scripts/ops/backup-health-textfile-exporter.py

@@ -191,6 +191,24 @@ def _newest_file_timestamp(patterns: list[str]) -> int:
     return newest
 
 
+def _newest_tree_timestamp(root: Path, max_entries: int = 5000) -> tuple[int, int]:
+    if not root.exists():
+        return 0, 0
+    newest = 0
+    count = 0
+    for path in root.rglob("*"):
+        try:
+            if not path.is_file():
+                continue
+            count += 1
+            newest = max(newest, int(path.stat().st_mtime))
+        except OSError:
+            continue
+        if count >= max_entries:
+            break
+    return newest, count
+
+
 def _read_backup_110_timestamp() -> int:
     candidates = [
         Path("/home/ollama/node_exporter_textfiles/backup.prom"),
@@ -907,6 +925,30 @@ def _collect_188(host: str) -> list[str]:
             sample_count=1,
         )
     )
+    gitea_mirror_ts, gitea_mirror_count = _newest_tree_timestamp(Path("/home/ollama/backup/110/gitea"))
+    gitea_mirror_fresh = 1 if gitea_mirror_ts and int(time.time()) - gitea_mirror_ts <= 25 * 3600 else 0
+    lines.extend(
+        _metric_lines_for_job(
+            host=host,
+            job="gitea_repo_mirror_from_110",
+            source="188-rsync-subtree",
+            target="/home/ollama/backup/110/gitea",
+            backup_type="rsync_subtree",
+            last_success=gitea_mirror_ts,
+            max_age_hours=25,
+            sample_count=gitea_mirror_count,
+        )
+    )
+    coverage_labels = (
+        f'host="{_escape_label(host)}",'
+        'domain="service",'
+        'required_jobs="backup_from_110,gitea_repo_mirror_from_110"'
+    )
+    lines.append(f"awoooi_backup_coverage_domain_expected_info{{{coverage_labels}}} 1")
+    lines.append(
+        "awoooi_backup_coverage_domain_fresh"
+        f"{{{coverage_labels}}} {1 if gitea_mirror_fresh else 0}"
+    )
     momo_ts = _newest_file_timestamp([
         "/home/ollama/momo_backups/*.sql.gz",
         "/home/ollama/momo-pro/backups/*.sql.gz",