Term 3 of #188. Forgejo has no GraphQL API, so these two gathers could not
be translated — there is no endpoint to translate them to. A real
forgejo-runner job says so from the other side: GITHUB_GRAPHQL_URL arrives
set to the empty string (probe task 278).
MERGED_REF_PR_RECORDS was already a body parse; GraphQL was buying
pagination, nothing semantic. OPEN_PR_ISSUES used GitHub's own parse of the
closing keywords, so it becomes lib/closes_references.sh — a sibling of
refs_references, sharing its LOCAL/CROSS classifier so rig#112 can still
never be read as local #112 (#61).
Both gathers now read /pulls, which /api/v3 and /api/v1 return in the same
shape (measured on both). merged_at replaces GraphQL's states: MERGED.
Bodies travel base64: jq's @tsv escapes a newline to a literal backslash-n,
which a line parser reads as one line and loses every declaration after the
first.
The accepted delta, written down rather than rediscovered: GitHub also
records closing links attached through the PR development sidebar, which
live in no body. This family declares links in the body, so the delta is
zero here.
Refs #188
