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/secret-scanner.yml

@@ -15,5 +15,9 @@ permissions:
 
 jobs:
   scan:
+    permissions:
+      contents: read
+      pull-requests: write
+      actions: read
     uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@d135b05bfc647d0c0fbfedc7e80f37ea50f49236
     secrets: inherit