DEVX-61: optimise slow unit tests and handle missing tea binary in TeaCLI

src/devx/gitea_cli.py

@@ -82,12 +82,15 @@ class TeaCLI:
         cmd = [self._tea, *args]
         if json_output:
             cmd.extend(["--output", "json"])
-        result = subprocess.run(  # nosec B603
-            cmd,
-            capture_output=True,
-            text=True,
-            check=False,
-        )
+        try:
+            result = subprocess.run(  # nosec B603
+                cmd,
+                capture_output=True,
+                text=True,
+                check=False,
+            )
+        except FileNotFoundError as e:
+            raise TeaCLIError(f"tea binary not found ('{self._tea}'). Install tea or add it to PATH.") from e
         if result.returncode != 0:
             raise TeaCLIError(
                 f"tea command failed (rc={result.returncode}): {' '.join(args)}\nstderr: {result.stderr.strip()}"