Forgejo's issue-list endpoint answers 'was this merged?' only inside the
nested pull_request object, while state says closed for a merged PR and
for one closed without merging alike. So the obvious top-level query is
null or ambiguous for every row, and with a // default it renders as a
confident 'nothing merged' that cannot ever be right -- a wrong answer
shaped exactly like a clean one.
Copy merged and merged_at up to the top level of each PR row so the
obvious query is the correct one. Additive: the nested object is left
untouched so an existing consumer keeps working, and issue rows have no
pull_request and pass through unchanged.
The head branch is deliberately not hoisted: this endpoint does not carry
it at all -- the row's ref is an empty string, not the branch -- so there
is nothing to lift. pr show has head_branch.
7630b0993c