fix(workflows): match gate reject option case-insensitively (#3335)

`validate` accepts a reject option case-insensitively
(`o.lower() in {"reject", "abort"}`), so a gate authored as
`options: [Approve, Reject]` passes validation. But `execute`
compared the echoed choice case-sensitively, so picking `Reject`
fell through to the approval path and silently ran downstream
steps instead of aborting.

Lower-case `choice` before the reject comparison so the runtime
agrees with the validation that let the option through.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/specify_cli/workflows/steps/gate/__init__.py

@@ -73,7 +73,14 @@ class GateStep(StepBase):
         choice = self._prompt(self._compose_prompt(message, show_file), options)
         output["choice"] = choice
 
-        if choice in ("reject", "abort"):
+        # Match rejection case-insensitively. ``_prompt`` echoes the option's
+        # original casing, and ``validate`` accepts a reject option
+        # case-insensitively (``o.lower() in {"reject", "abort"}``), so a gate
+        # authored as ``options: [Approve, Reject]`` passes validation. Comparing
+        # ``choice`` case-sensitively here would then treat a ``Reject`` pick as
+        # approval and silently skip the abort — the reject path must agree with
+        # the check that let the option through.
+        if choice.lower() in ("reject", "abort"):
             if on_reject == "abort":
                 output["aborted"] = True
                 return StepResult(