ci: run unit tests on every push

Move per-step `when` filters: unit tests now run on every branch push,
integration tests keep pull_request + main/dev branch restriction.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.woodpecker/check.yml

@@ -1,21 +1,25 @@
-when:
-  event: pull_request
-  branch:
-    - main
-    - dev
-  path:
-    - "src/**"
-    - "tests/**"
-
 steps:
   unit-tests:
     image: ghcr.io/astral-sh/uv:python3.13-bookworm
+    when:
+      event: push
+      path:
+        - "src/**"
+        - "tests/**"
     commands:
       - uv sync --dev
       - uv run pytest -m "not integration" -v
 
   integration-tests:
     image: ghcr.io/astral-sh/uv:python3.13-bookworm
+    when:
+      event: pull_request
+      branch:
+        - main
+        - dev
+      path:
+        - "src/**"
+        - "tests/**"
     environment:
       WRENN_API_KEY:
         from_secret: WRENN_API_KEY