Save Project Links

Save booking links for a project.

Accepts EITHER a shared_url (applied to every segment) OR a per_segment mapping (segment_id → url). Validates each non-empty url with _gate_target_url (format + LLM scam gate) and 422s on the first invalid value (input order).

Three phases, in a fixed order (T-1526):

1. authz reads in a short session — ownership 404s BEFORE any external call, so a stranger can't burn Scrapfly/LLM against a project they don't own;
2. the gates, OUTSIDE any transaction — the fetch+LLM gate runs up to ~45s per URL (GATE_DEADLINE_SECONDS), and the old single-transaction shape held segment row locks and an idle-in-transaction connection across that I/O;
3. a write-only transaction with the UPDATEs (re-checks the project so a concurrently-deleted one isn't resurrected by a blind write).