GRM-58: refactor: require tea CLI everywhere, fail on missing Vikunja task

scripts/ci/auto_merge.py

@@ -109,7 +109,8 @@ def validate_pr_title(pr_title: str, task_id: str) -> None:
 def get_vikunja_task_title(task_id: str) -> str:
     """Fetch the Vikunja task title for the given GRM-N identifier.
 
-    Returns empty string if VIKUNJA_TOKEN is not set (skip validation).
+    Returns empty string if VIKUNJA_TOKEN is not set (local dev without token).
+    Raises ClickException if the token is set but the task is not found.
     """
     token = os.environ.get("VIKUNJA_TOKEN", "")
     if not token:
@@ -126,17 +127,26 @@ def get_vikunja_task_title(task_id: str) -> str:
         if len(tasks) < DEFAULT_PER_PAGE:
             break
         page += 1
-    return ""
+    raise click.ClickException(
+        _(
+            "Could not find Vikunja task {task_id} in project {project_id}. "
+            "Every PR must have a corresponding Vikunja task.",
+            task_id=task_id,
+            project_id=VIKUNJA_PROJECT_ID,
+        )
+    )
 
 
 def validate_pr_title_matches_vikunja(pr_title: str, task_id: str) -> None:
     """Validate that PR title matches the Vikunja task title.
 
-    Skips validation if VIKUNJA_TOKEN is not set.
+    Skips validation if VIKUNJA_TOKEN is not set (local dev).
+    Raises ClickException if the task is not found or the title doesn't match.
     """
     vikunja_title = get_vikunja_task_title(task_id)
     if not vikunja_title:
-        click.echo(_("Warning: could not fetch Vikunja task title, skipping title match validation."))
+        # VIKUNJA_TOKEN not set — skip validation (local dev)
+        click.echo(_("Warning: VIKUNJA_TOKEN not set, skipping title match validation."))
         return
     expected = f"{task_id}: {vikunja_title}"
     if pr_title != expected: