fix(ci): estate-wide structural CI fixes

- grant secret-scanner reusable its requested job permissions
- drop invalid timeout-minutes on reusable-call jobs
- drop hashFiles() from job-level if: expressions

Author: hyperpolymath

.github/workflows/governance.yml

@@ -32,4 +32,3 @@ permissions:
 jobs:
   governance:
     uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00 # main 2026-06-27
-    timeout-minutes: 30

.github/workflows/hypatia-scan.yml

@@ -32,5 +32,4 @@ jobs:
     # 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/scorecard.yml

@@ -17,4 +17,3 @@ jobs:
       id-token: write
     uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00
     secrets: inherit
-    timeout-minutes: 20

.github/workflows/secret-scanner.yml

@@ -15,6 +15,9 @@ permissions:
 
 jobs:
   scan:
+    permissions:
+      contents: read
+      pull-requests: write
+      actions: read
     uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@e9c8888769a703924cc3c0d717900960d78aea00
     secrets: inherit
-    timeout-minutes: 20