chore: remove Forgejo Actions workflow — cron is primary for now

Forgejo runner adds complexity before build.sh is working.
Workflow file (runner/README.md) kept for when CI/CD is needed.
Cron job documented in runner/README.md as the active automation path.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/build.yml

@@ -1,73 +0,0 @@
-name: Build Clawdie ISO
-
-# Triggers:
-#   - Push to main (fresh build on every change)
-#   - Weekly Sunday 03:00 UTC (catches upstream pkg updates)
-#   - Manual dispatch (with optional overrides)
-
-on:
-  push:
-    branches: [main]
-  schedule:
-    - cron: '0 3 * * 0'
-  workflow_dispatch:
-    inputs:
-      clawdie_version:
-        description: 'Clawdie-AI version to bundle (default: latest tag)'
-        required: false
-        default: ''
-      skip_fetch:
-        description: 'Skip package fetch — use runner cache'
-        type: boolean
-        default: false
-
-jobs:
-  build:
-    runs-on: [self-hosted, freebsd]
-    timeout-minutes: 180
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      # Step 1 — fetch packages (runs as normal user, no root needed)
-      # Packages are cached on the runner between runs.
-      # Weekly trigger always re-fetches to pick up upstream updates.
-      - name: Fetch packages
-        if: ${{ !inputs.skip_fetch || github.event_name == 'schedule' }}
-        run: ./build.sh --fetch-only
-
-      # Step 2 — assemble ISO (needs root for mdconfig/mount)
-      - name: Build ISO
-        run: sudo ./build.sh --skip-fetch ${{ inputs.clawdie_version && format('--clawdie-version {0}', inputs.clawdie_version) || '' }}
-
-      # Step 3a — publish to local CMS nginx downloads (primary)
-      # Runner is on the controlplane, direct copy to jail webroot.
-      - name: Publish to CMS downloads
-        if: github.ref == 'refs/heads/main'
-        run: sudo ./scripts/publish.sh
-
-      # Step 3b — create Codeberg release entry (metadata only, not the image)
-      # The ISO is too large to upload as a release artifact.
-      # Release entry contains: version, date, checksum, local download URL.
-      - name: Create release entry
-        if: github.ref == 'refs/heads/main'
-        uses: actions/forgejo-release@v2
-        with:
-          direction: upload
-          release-dir: release-meta/
-          token: ${{ secrets.FORGEJO_TOKEN }}
-          tag: build-${{ github.run_number }}
-          release-notes: |
-            Automated build from commit ${{ github.sha }}
-            Download: https://${{ secrets.AGENT_DOMAIN }}/downloads/clawdie-iso-latest.img
-
-      # Step 4 — upload packages/ repo as workflow artifact (pkg cache seed)
-      # This artifact can be downloaded and used to seed zroot/pkg-cache
-      # on a running Clawdie system without building a full ISO.
-      - name: Upload pkg cache artifact
-        uses: actions/upload-artifact@v4
-        with:
-          name: pkg-cache-${{ github.run_number }}
-          path: packages/
-          retention-days: 90