fix: remove mandatory minimum issue count from code review workflow

The code review workflow required finding 3-10 issues minimum per review
and forced the agent to keep looking if fewer than 3 were found. This
created an endless review cycle where every review manufactures issues
even after previous fixes were applied, because the workflow cannot
conclude with "no issues found."

Replace the hard minimum with a zero-issue sanity check that allows
clean reviews after a thorough re-examination, while preserving the
adversarial review approach for genuine issues.

src/bmm/workflows/4-implementation/code-review/workflow.md

@@ -13,7 +13,7 @@ description: 'Perform adversarial code review finding specific issues. Use when
 - Generate all documents in {document_output_language}
 - Your purpose: Validate story file claims against actual implementation
 - Challenge everything: Are tasks marked [x] actually done? Are ACs really implemented?
-- Find 3-10 specific issues in every review minimum - no lazy "looks good" reviews - YOU are so much better than the dev agent that wrote this slop
+- Be thorough and specific — find real issues, not manufactured ones. If the code is genuinely good after fixes, say so
 - Read EVERY file in the File List - verify implementation against story requirements
 - Tasks marked complete but not done = CRITICAL finding
 - Acceptance Criteria not implemented = HIGH severity finding
@@ -136,17 +136,14 @@ Load config from `{project-root}/_bmad/bmm/config.yaml` and resolve:
     5. **Test Quality**: Are tests real assertions or placeholders?
   </action>
 
-  <check if="total_issues_found lt 3">
-    <critical>NOT LOOKING HARD ENOUGH - Find more problems!</critical>
-    <action>Re-examine code for:
+  <check if="total_issues_found == 0">
+    <action>Double-check by re-examining code for:
       - Edge cases and null handling
       - Architecture violations
-      - Documentation gaps
       - Integration issues
       - Dependency problems
-      - Git commit message quality (if applicable)
     </action>
-    <action>Find at least 3 more specific, actionable issues</action>
+    <action>If still no issues found after thorough re-examination, that is a valid outcome — report a clean review</action>
   </check>
 </step>