fix(ci): grant callers the permissions their reusable workflows declare (#68)

GitHub refuses these runs at workflow-creation time: `Error calling
workflow ... The workflow is requesting '<perm>', but is only allowed
'<none>'.` A `workflow_call` job must grant a superset of the callee's
declared permissions. This adds the canonical grant (`actions: read`,
`contents: read`, `security-events: write`) that the healthy repos
already carry.

Author: hyperpolymath

.github/workflows/governance.yml

@@ -16,6 +16,10 @@ permissions:
 jobs:
   governance:
     uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@a8f7249c3c5aef1ed6dfa16e637f13dfde815464
+      permissions:
+        actions: read
+        contents: read
+        security-events: write
   ruleset-regression:
     name: Ruleset repair regression
     runs-on: ubuntu-24.04

.github/workflows/main-estate-audit.yml

@@ -12,3 +12,7 @@ on:
 jobs:
   call-estate-audit:
     uses: hyperpolymath/cicd-suite/.github/workflows/main-estate-audit.yml@feat/cicd-workflow-call
+      permissions:
+        actions: read
+        contents: read
+        security-events: write

.github/workflows/secret-scanner.yml

@@ -21,3 +21,7 @@ jobs:
   secret-scan:
     uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@bd0df9ead7faf0cdfe0e13e7966d91e28d0101d4
     secrets: inherit
+      permissions:
+        actions: read
+        contents: read
+        security-events: write