feat(admin): observability — job history, live now-analyzing, durations & metrics (0.84.0) (#6)

backend/src/crawler/content.rs

@@ -197,8 +197,69 @@ where
 /// On any failure the chapter stays at `page_count = 0` (no partial
 /// rows) and the blobs already written are deleted best-effort by
 /// [`cleanup_orphans`], so a retry starts clean.
+/// Timing wrapper over [`sync_chapter_content_inner`]: records one `chapter`
+/// row in `crawl_metrics` with the wall-clock and outcome. Best-effort — a
+/// metrics-write failure never fails the chapter sync. `Skipped` /
+/// `SessionExpired` perform no fetch, so they aren't timed.
 #[allow(clippy::too_many_arguments)]
 pub async fn sync_chapter_content(
+    browser: &chromiumoxide::Browser,
+    db: &PgPool,
+    storage: &dyn Storage,
+    http: &reqwest::Client,
+    rate: &HostRateLimiters,
+    chapter_id: Uuid,
+    manga_id: Uuid,
+    source_url: &str,
+    force_refetch: bool,
+    allowlist: &DownloadAllowlist,
+    max_image_bytes: usize,
+    tor: Option<&crate::crawler::tor::TorController>,
+    progress: Option<&crate::crawler::status::StatusHandle>,
+    enqueue_analysis: bool,
+) -> anyhow::Result<SyncOutcome> {
+    let started = std::time::Instant::now();
+    let result = sync_chapter_content_inner(
+        browser, db, storage, http, rate, chapter_id, manga_id, source_url,
+        force_refetch, allowlist, max_image_bytes, tor, progress, enqueue_analysis,
+    )
+    .await;
+    let duration_ms = started.elapsed().as_millis() as i64;
+    match &result {
+        Ok(SyncOutcome::Fetched { pages }) => {
+            let _ = crate::repo::crawl_metrics::record(
+                db,
+                crate::repo::crawl_metrics::OP_CHAPTER,
+                Some(manga_id),
+                Some(chapter_id),
+                "ok",
+                duration_ms,
+                Some(*pages as i32),
+                None,
+            )
+            .await;
+        }
+        Err(e) => {
+            let _ = crate::repo::crawl_metrics::record(
+                db,
+                crate::repo::crawl_metrics::OP_CHAPTER,
+                Some(manga_id),
+                Some(chapter_id),
+                "failed",
+                duration_ms,
+                None,
+                Some(&format!("{e:#}")),
+            )
+            .await;
+        }
+        // Skipped / SessionExpired: no fetch performed → not a timed op.
+        Ok(_) => {}
+    }
+    result
+}
+
+#[allow(clippy::too_many_arguments)]
+async fn sync_chapter_content_inner(
     browser: &chromiumoxide::Browser,
     db: &PgPool,
     storage: &dyn Storage,