Phase 6: sync jobs, inquiry and order forms

- Sync scheduler in the content service with a per-job cache (sync_cache),
  sync_runs reporting and Healthchecks pings. Jobs: Archidekt, BoardGameGeek,
  cover art (Open Library, TMDB, AniList), Suwayomi and Kavita reading
  progress, Bambuddy filament and Homebox material stock. A note's own value
  always wins over a synced one.
- PersonalReader: updates only Library notes with a matching anilistId,
  changes to Greg's notes are held for review; Reading series with no note
  show as suggestions on the admin Overview.
- /api/inquiries and /api/orders: Turnstile, rate limits, a saved copy in the
  content service (intake token) plus email over SMTP. Orders are re-checked
  against the live notes: accepted only when the category's ordersOpen is
  true and the line has capacity.
- Admin Inbox for saved submissions. Options' inStock is optional so synced
  stock can fill it. All settings from process.env; .env.example per service.
- Sources could not be reached from the build environment; parsers are tested
  against fixtures labelled as not live.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012aSbo2D1qP8cMFQCykf7kx

services/content/test/sync/fixtures/suwayomi-library.sample.json

@@ -0,0 +1,42 @@
+{
+  "data": {
+    "categories": {
+      "nodes": [
+        { "name": "Default", "mangas": { "nodes": [
+          { "title": "Uncategorised Series", "inLibrary": true, "latestReadChapter": null, "trackRecords": { "nodes": [] } }
+        ] } },
+        { "name": "Reading", "mangas": { "nodes": [
+          { "title": "Sample Tower Climber (Source Title)", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 142, "lastReadAt": "1759900000" },
+            "trackRecords": { "nodes": [
+              { "trackerId": 1, "remoteId": "555", "title": "Sample Tower Climber MAL", "lastChapterRead": 140 },
+              { "trackerId": 2, "remoteId": "100001", "title": "Sample Tower Climber", "lastChapterRead": 142 }
+            ] } },
+          { "title": "New Sample Series", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 3, "lastReadAt": "1759990000" },
+            "trackRecords": { "nodes": [ { "trackerId": 2, "remoteId": "100004", "title": "New Sample Series", "lastChapterRead": 3 } ] } },
+          { "title": "Untracked Sample", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 7, "lastReadAt": "0" },
+            "trackRecords": { "nodes": [] } }
+        ] } },
+        { "name": "Plan to read", "mangas": { "nodes": [
+          { "title": "Sample Later", "inLibrary": true, "latestReadChapter": null,
+            "trackRecords": { "nodes": [ { "trackerId": 2, "remoteId": "100002", "title": "Sample Later", "lastChapterRead": 0 } ] } }
+        ] } },
+        { "name": "Completed", "mangas": { "nodes": [
+          { "title": "Sample Tower Climber (Source Title)", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 142, "lastReadAt": "1759900000" },
+            "trackRecords": { "nodes": [ { "trackerId": 2, "remoteId": "100001", "title": "Sample Tower Climber", "lastChapterRead": 142 } ] } },
+          { "title": "Sample Finished", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 88.5, "lastReadAt": "1750000000000" },
+            "trackRecords": { "nodes": [ { "trackerId": 2, "remoteId": "100003", "title": "Sample Finished", "lastChapterRead": 88 } ] } }
+        ] } },
+        { "name": "Dropped", "mangas": { "nodes": [
+          { "title": "Sample Dropped", "inLibrary": true,
+            "latestReadChapter": { "chapterNumber": 12, "lastReadAt": "1740000000" },
+            "trackRecords": { "nodes": [ { "trackerId": 2, "remoteId": "100005", "title": "Sample Dropped", "lastChapterRead": 12 } ] } }
+        ] } }
+      ]
+    }
+  }
+}