ci: run Harden-Runner on every job (#811)

Adds step-security/harden-runner (audit, pinned to v2.22.4 like
craft-common-actions) as the first step of each job that did not have it,
so every workflow in the org's public repos reports its egress to
StepSecurity. Audit, not block: block-mode allow lists come from each
job's observed traffic.

.github/workflows/keymap.yml

@@ -26,6 +26,10 @@ jobs:
     env:
       CRAFT_FONTS_DIR: ${{ github.workspace }}/.test-inputs/craft-fonts
     steps:
+      - name: Harden runner
+        uses: step-security/harden-runner@1d88384fd173af6ecb012dfd0264a306b711241a # v2.22.4
+        with:
+          egress-policy: audit
       - uses: actions/checkout@v7
         with:
           persist-credentials: false
@@ -65,6 +69,10 @@ jobs:
     env:
       CRAFT_FONTS_DIR: ${{ github.workspace }}/.test-inputs/craft-fonts
     steps:
+      - name: Harden runner
+        uses: step-security/harden-runner@1d88384fd173af6ecb012dfd0264a306b711241a # v2.22.4
+        with:
+          egress-policy: audit
       - uses: actions/checkout@v7
         with:
           persist-credentials: false
@@ -86,6 +94,10 @@ jobs:
     name: Keymap WASM
     runs-on: ubuntu-latest
     steps:
+      - name: Harden runner
+        uses: step-security/harden-runner@1d88384fd173af6ecb012dfd0264a306b711241a # v2.22.4
+        with:
+          egress-policy: audit
       - uses: actions/checkout@v7
         with:
           persist-credentials: false