fix: update M4.1 scenarios for M4.2 allowing empty/whitespace guidance in request_correction

features/correction_model.feature

@@ -98,15 +98,15 @@ Feature: Correction Model
     When I try to request a correction with empty plan ID
     Then a validation error should be raised with message containing "plan_id"
 
-  Scenario: Empty guidance rejection
+  Scenario: Empty guidance is accepted
     Given a correction service
     When I try to request a correction with empty guidance
-    Then a validation error should be raised with message containing "guidance"
+    Then the correction should be created
 
-  Scenario: Whitespace-only guidance rejection
+  Scenario: Whitespace-only guidance is accepted
     Given a correction service
     When I try to request a correction with whitespace-only guidance
-    Then a validation error should be raised with message containing "guidance"
+    Then the correction should be created
 
   # ── Status Transitions ───────────────────────────────────────
 

features/steps/correction_model_steps.py

@@ -205,30 +205,24 @@ def step_when_empty_plan(context):
 def step_when_empty_guidance(context):
     svc = context.correction_service
     context.error = None
-    try:
-        svc.request_correction(
-            plan_id="plan-1",
-            target_decision_id="DEC-001",
-            mode=CorrectionMode.REVERT,
-            guidance="",
-        )
-    except ValidationError as exc:
-        context.error = exc
+    context.correction = svc.request_correction(
+        plan_id="plan-1",
+        target_decision_id="DEC-001",
+        mode=CorrectionMode.REVERT,
+        guidance="",
+    )
 
 
 @when("I try to request a correction with whitespace-only guidance")
 def step_when_whitespace_guidance(context):
     svc = context.correction_service
     context.error = None
-    try:
-        svc.request_correction(
-            plan_id="plan-1",
-            target_decision_id="DEC-001",
-            mode=CorrectionMode.REVERT,
-            guidance="   ",
-        )
-    except ValidationError as exc:
-        context.error = exc
+    context.correction = svc.request_correction(
+        plan_id="plan-1",
+        target_decision_id="DEC-001",
+        mode=CorrectionMode.REVERT,
+        guidance="   ",
+    )
 
 
 @when("I try to create a CorrectionRequest with empty plan_id")