Add backup and restore actions to bot

.github/workflows/backup.yml

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+name: Database backup
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:   
+  run_db_backup:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    env:
+      supabase_db_url: ${{ secrets.SUPABASE_DB_URL }}   # Encrypted Supabase DB URL
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}
+
+      - uses: supabase/setup-cli@v1
+        with:
+          version: latest
+
+      - name: Backup roles
+        run: supabase db dump --db-url "$supabase_db_url" -f roles.sql --role-only
+
+      - name: Backup schema
+        run: supabase db dump --db-url "$supabase_db_url" -f schema.sql
+
+      - name: Backup data
+        run: supabase db dump --db-url "$supabase_db_url" -f data.sql --data-only --use-copy
+
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: Database backup

.github/workflows/restore.yml

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+name: Database restore
+
+on:
+  workflow_dispatch:
+    inputs:
+      restore-trigger:
+        description: 'Trigger database restore'
+        required: false
+        default: 'manual-restore'
+
+jobs:
+  restore_db:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    env:
+      supabase_db_url: ${{ secrets.SUPABASE_DB_URL }}   # Encrypted Supabase DB URL
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: supabase/setup-cli@v1
+        with:
+          version: latest
+
+      - name: Restore roles
+        run: supabase db restore --db-url "$supabase_db_url" -f roles.sql --role-only
+
+      - name: Restore schema
+        run: supabase db restore --db-url "$supabase_db_url" -f schema.sql
+
+      - name: Restore data
+        run: supabase db restore --db-url "$supabase_db_url" -f data.sql --data-only