v0.72.91

Changelog

• ca722b4 Add explicit unlimited stage duration contract (-1 lifts stage cap under the safety ceiling) (#1052)
• 18e5308 Add typed Agent Card discovery failure (#1057)
• 13dd70b Backstop: 261c3950-c73c-4f3a-8bf9-cfa7bc9f9790 (#1055)
• 8de8c92 Claude sessions report compactions, re-inject launch context, disable host-local auto memory (#1053)
• 1be044f Consume typed pre-execution refusal evidence fail closed (#1059)
• d6ba944 Pin preflight registration requests to accepted contract version (#1056)
• 1db83d1 Record explicit-base launch SHA through runner to status (#1060)
• df04cf0 Recover stale snapshots without blocking claims (#1058)
• da32528 chore(release): prepare v0.72.91