ci: fix woodpecker v3 syntax - secrets, when blocks

.woodpecker.yml

@@ -8,12 +8,16 @@ steps:
     commands:
       - pip install ruff==0.15.10 --quiet
       - ruff check services/
+    when:
+      event: [push, pull_request]
 
   test-python:
     image: python:3.12-slim
     commands:
       - pip install -r requirements.txt --quiet
       - pytest tests/ -x --tb=short -q
+    when:
+      event: [push, pull_request]
 
   test-frontend:
     image: node:24-slim
@@ -21,6 +25,8 @@ steps:
       - cd frontend
       - npm ci
       - npx vitest --run
+    when:
+      event: [push, pull_request]
 
   build-scheduler:
     image: woodpeckerci/plugin-docker-buildx
@@ -337,6 +343,9 @@ steps:
 
   mirror-github:
     image: alpine/git
+    environment:
+      GITHUB_SSH_KEY:
+        from_secret: github_ssh_key
     commands:
       - mkdir -p ~/.ssh
       - echo "$GITHUB_SSH_KEY" > ~/.ssh/id_ed25519
@@ -345,8 +354,6 @@ steps:
       - git remote add github git@github.com:celesrenata/stonks-oracle.git || git remote set-url github git@github.com:celesrenata/stonks-oracle.git
       - git push github main --force
       - git push github --tags --force
-    secrets:
-      - github_ssh_key
     when:
       event: push
       branch: main