fix(ci): drop invalid job-level timeout-minutes from reusable-workflow calls

governance.yml, hypatia-scan.yml, mirror.yml and secret-scanner.yml each set
`timeout-minutes:` on a job that calls a reusable workflow via `uses:`. GitHub
does not permit that key on a workflow_call job, so it rejected all four files
at parse time: each failed instantly (0s, titled by raw filename) on every
push and never ran a single job. That silently disabled governance, hypatia
scanning, GitLab mirroring and secret scanning on the hub.

The standards `*-reusable.yml` workflows already declare `timeout-minutes` on
every internal job, so the caller-side key was redundant as well as invalid.
Removing it restores the four workflows and matches the already-correct
rsr-template-repo pattern. The upstream hypatia rule `missing_timeout_minutes`
(lib/rules/workflow_audit.ex) already exempts reusable-call jobs, so these
will not be re-flagged.

Verified with actionlint (real tool): all four files parse clean, exit 0; zero
`timeout-minutes is not available` findings remain on the hub.

Part of the estate-wide CI cleanup: 84 repos carry this same dead pattern.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/governance.yml

@@ -32,4 +32,3 @@ permissions:
 jobs:
   governance:
     uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@412a7031577112b31ee287cc6060179d638d6500 # main 2026-06-27
-    timeout-minutes: 30

.github/workflows/hypatia-scan.yml

@@ -29,8 +29,4 @@ jobs:
   hypatia:
     uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00
     secrets: inherit
-    # Total caller-side wall-clock cap for the reusable. Matches
-    # Hypatia's `missing_timeout_minutes` rule expectation. The scan is
-    # typically ~3 min; the cap leaves headroom for slow estate builds.
-    timeout-minutes: 30
 

.github/workflows/mirror.yml

@@ -13,4 +13,3 @@ jobs:
   mirror:
     uses: hyperpolymath/standards/.github/workflows/mirror-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00
     secrets: inherit
-    timeout-minutes: 60

.github/workflows/secret-scanner.yml

@@ -20,5 +20,4 @@ jobs:
       pull-requests: write
       actions: read
     uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00
-    secrets: inherit
-    timeout-minutes: 20
+    secrets: inherit