WeebCentral and MangaPill are off by default, with an admin switch per source

Both are unofficial sites that mostly host unlicensed copies; MangaDex (official
API) stays on. Settings → Admin → Scraper → Hoster settings has a 'Use <source>'
switch. A switched-off source refuses new jobs, keeps queued jobs waiting and is
skipped by nightly update checks. Installations whose queue or history already
used a source keep it switched on, so upgrades don't stop a working queue.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/deployment.md

@@ -114,7 +114,11 @@ account. The library page fills as soon as the first scan finishes.
 - **Private access over a VPN** (WireGuard, Tailscale, …): bind the reader to the VPN address, or keep it on
   loopback and forward from the VPN client.
 - **Adding manga:** admins use **Settings → Admin → Scraper → Inspect & queue** with a series URL from a
-  supported source (WeebCentral, MangaDex, MangaPill), or copy folders into the library by hand. The reader
+  supported source, or copy folders into the library by hand. MangaDex is on by default. WeebCentral and
+  MangaPill are unofficial sites that mostly host unlicensed copies, so they start switched off. Switch them
+  on per source under **Hoster settings** if you may copy what you download there. While a source is off,
+  its queued jobs wait and nightly update checks skip it. Upgraded installations keep the sources their
+  queue already used. The reader
   notices new folders within `SCAN_INTERVAL` minutes. Rules for tools that write into the library:
   [scraper-guide.md](scraper-guide.md). Only download what you are allowed to copy; the scraper keeps
   conservative per-host rate limits and stops on 401/403/429 ([scraper/AGENT_RUNBOOK.md](../scraper/AGENT_RUNBOOK.md)).