forgejo-api 0.11.1's sync client builds its own reqwest client with no
timeout and takes no caller-supplied client (sync.rs: new and
with_user_agent are the only constructors), so a forge that accepts a
connection and then stalls blocked every typed verb forever.
A watchdog thread now starts before the client is built. After
HIVE_FORGE_DEADLINE seconds (default 900, five minutes above
DOWNLOAD_TIMEOUT) it prints a hive-forge: FAILED: line and exits 75.
It bounds the whole command, not each request, and a write may already
have landed when it fires; the help text and docs/tools/forge.md say so.
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