Preserve per-source pacing across queue jobs and add source pause

docs/scraper-service.md

@@ -83,7 +83,7 @@ abandoned hidden partial stages, atomically exposes the accumulated manga folder
 changes its checkpoint to incremental mode. The resumed job then derives its remaining
 work from the visible library and publishes every later chapter immediately.
 
-A source failure pauses only that source, allowing unrelated source workers to continue. Manual pause remains global. Request and chapter delays are configured independently for every installed host in **Settings → Scraper**. Both current adapters default to the fast profile: 1–4 seconds between sequential requests and 5–15 seconds between chapters.
+A source failure pauses only that source, allowing unrelated source workers to continue. Manual pause remains global. Request and chapter delays are configured independently for every installed host in **Settings → Scraper**. The current adapters default to the fast profile: 1–4 seconds between sequential requests and 5–15 seconds between chapters. The in-process request gate is shared across successive jobs on the same source, so changing titles does not reset the request gap.
 
 The reader polls `publishedRevision` every 15 seconds and rescans after it increases.
 A source error pauses only that source lane for human review. Pause and shutdown requests
@@ -202,7 +202,7 @@ All responses are JSON. When `SCRAPER_TOKEN` is set, send
 | `POST` | `/api/queue/remove` | `{id}`; active downloads cannot be removed |
 | `POST` | `/api/queue/clear-completed` | `{source?}`; remove inactive successful download job rows only; preserve library, history, checkpoints and other statuses |
 | `POST` | `/api/queue/reorder` | `{ids}` containing every queue id exactly once |
-| `POST` | `/api/control` | `{action:"pause"|"resume"|"retry"|"inspect"|"confirm"|"skip",id?}` |
+| `POST` | `/api/control` | `{action:"pause"|"resume"|"retry"|"inspect"|"confirm"|"skip",id?}`; `pause-source`/`resume-source` use `id` as the source name and do not change the global pause |
 | `POST` | `/api/settings` | `sourceRates.{adapter}.{minMs,maxMs,chapterMinMs,chapterMaxMs}` plus `autoUpdateEnabled` and local `autoUpdateTime` (`HH:MM`) |
 | `POST` | `/api/discovery/run` | Queue an immediate update check for every enabled manga |
 | `POST` | `/api/library/auto-update` | `{id,enabled}` updates `manga.json` atomically |