fix: update brainstorm -> concept-brainstorm refs in modulefile.yaml and catalog.yaml

PR #68 renamed /brainstorm to /concept-brainstorm but missed two
files that still referenced the old name, causing CI failures:
- Module Integrity: core module listed brainstorm in skills/commands
- Workflow Integrity I10: catalog.yaml had stale brainstorm entry

Both checks now pass (21/21 modules, 4/4 workflow suites).

Author: striderZA

.opencode/modules/core/modulefile.yaml

@@ -4,12 +4,34 @@ description: "Framework skeleton — directors, onboarding, validation, workflow
 depends: []
 provides:
   agents: [creative-director, technical-director, producer]
-  skills: [start, help, brainstorm, setup-engine, init-template, map-systems, project-stage-detect,
-           gate-check, create-architecture, architecture-decision]
-  commands: [start, help, brainstorm, setup-engine, init-template, map-systems, project-stage-detect,
-             create-architecture, architecture-decision]
+  skills:
+    [
+      start,
+      help,
+      concept-brainstorm,
+      setup-engine,
+      init-template,
+      map-systems,
+      project-stage-detect,
+      gate-check,
+      create-architecture,
+      architecture-decision,
+    ]
+  commands:
+    [
+      start,
+      help,
+      concept-brainstorm,
+      setup-engine,
+      init-template,
+      map-systems,
+      project-stage-detect,
+      create-architecture,
+      architecture-decision,
+    ]
   rules: []
   plugins: [ccgs-hooks, drift-detector, changelog-generator]
-  docs: [workflow-catalog, director-gates, coordination-rules, context-management]
+  docs:
+    [workflow-catalog, director-gates, coordination-rules, context-management]
 plugged-into:
   engines: []

skill-testing-framework/catalog.yaml

@@ -335,8 +335,8 @@ skills:
     priority: low
     category: utility
 
-  - name: brainstorm
-    spec: CCGS Skill Testing Framework/skills/utility/brainstorm.md
+  - name: concept-brainstorm
+    spec: CCGS Skill Testing Framework/skills/utility/concept-brainstorm.md
     last_static: ""
     last_static_result: ""
     last_spec: ""