1a8d1b3bf1
Bring the supervised source-candidate flow into Sources (Codex's v1 scope), so
adding feeds no longer needs the CLI.
* feeds.safe_fetch_feed: SSRF-safe fetch for UNTRUSTED (admin-pasted) URLs —
http(s) only, every redirect hop re-validated via enrich._host_is_public,
body size-capped, bounded redirects, no cookies. preview_feed gains a
`fetcher` param; the API path passes safe_fetch_feed (NOT the raw fetch_feed
used for already-vetted polling).
* API (admin-gated): GET /candidates; POST /candidates (suggest+preview, gated
before the outbound fetch, no DB conn held during network); /{id}/preview
(explicit re-preview); /{id}/promote (paused by default, returns the new
source + updated candidate); /{id}/reject. rejected stays on candidates only.
* Admin Sources tab: "Add a source" field + a candidate queue showing the
preview (pass rate, recent count, example headlines) with Promote (as paused,
or Activate immediately) / Re-preview / Reject.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>