Bump eec-campaigns to v0.1.7, scope sync to changed campaigns

Only the campaign(s) whose files changed in this push get resolved and
diffed against listmonk now, instead of every campaign every time --
falls back to a full scan automatically if the before-commit can't be
determined. fetch-depth: 0 so that commit is always available to diff
against locally.

.gitea/workflows/sync.yml

@@ -8,16 +8,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - uses: actions/setup-go@v5
         with:
           go-version: "1.23.1"
 
       - name: Install eec-campaigns
-        run: go install gitea.reground.org/will/eec-campaigns@v0.1.6
+        run: go install gitea.reground.org/will/eec-campaigns@v0.1.7
 
       - name: Sync campaigns to listmonk
-        run: eec-campaigns sync .
+        run: eec-campaigns sync . "${{ gitea.event.before }}"
         env:
           LISTMONK_BASE_URL: ${{ secrets.CAMPAIGNS_LISTMONK_BASE_URL }}
           LISTMONK_API_USER: ${{ secrets.CAMPAIGNS_LISTMONK_API_USER }}