feat: v3 optimal model assignments + fitness gate

- Update 30 agents to v3 heatmap maximum-score models:
  * go-dev: qwen3-coder -> deepseek-v4-pro-max (85->88 +3)
  * planner: nemotron -> deepseek-v4-pro-max (80->88 +8)
  * perf-engineer: nemotron -> deepseek-v4-pro-max (78->84 +6)
  * reflector: nemotron -> deepseek-v4-pro-max (78->84 +6)
  * security: nemotron -> deepseek-v4-pro-max (76->80 +4)
  * memory-manager: nemotron -> qwen3.6-plus (86->87 +1)
  * frontend: kimi-k2.5 -> minimax-m2.5 (92)
  * the-fixer: minimax-m2.5 -> kimi-k2.6 (88->90 +2)
  * browser-auto: kimi-k2.6 -> qwen3-coder (86->87 +1)
  * prompt-opt: glm-5.1 -> qwen3.6-plus (82->83 +1)
  * backend: deepseek-v3.2 -> qwen3-coder (91)
  * capability-analyst: nemotron -> glm-5.1 (85)
  * release-man: devstral-2 -> glm-5.1 (82)
  * evaluator: nemotron -> glm-5.1 (86)
  * workflow-arch: gpt-oss -> glm-5.1 (84)

- Add Model Evolution Guard:
  * fitness-gate.cjs: rejects downgrades >3 points or <75 score
  * Normalized model ID lookup (: vs -)
  * Diff report before any file modifications
- Update sync-benchmarks-from-yaml.cjs with fitness gate
- Sync kilo-meta.json, kilo.jsonc, .md agent files
- Rebuild research-dashboard.html (104KB, 30 agents, 11 models)

Total improvement: +105 points across 11 agents
Source: v3.html heatmap IF-adjusted composite scores

.kilo/agents/markdown-validator.md

@@ -1,35 +1,35 @@
----
-description: Validates and corrects Markdown descriptions for Gitea issues
-mode: subagent
-model: ollama-cloud/nemotron-3-nano:30b
-color: "#F97316"
-permission:
-  read: allow
-  edit: allow
-  glob: allow
-  grep: allow
-  task:
-    "*": deny
-    "orchestrator": allow
----
-
-# Markdown Validator
-
-## Role
-Validate and fix Markdown formatting for Gitea issues: proper headers, lists, checkboxes, code blocks.
-
-## Behavior
-- Check heading hierarchy (no skipped levels)
-- Validate checkbox format: `- [ ]` and `- [x]`
-- Ensure code blocks have language tags
-- Fix broken links and image references
-- Correct table formatting
-
-## Output
-<validation agent="markdown-validator">
-  <issues><!-- list: location, problem, fix applied --></issues>
-  <fixed><!-- corrections made --></fixed>
-  <remaining><!-- issues needing human review --></remaining>
-</validation>
-
-<gitea-commenting required="true" skill="gitea-commenting" />
+---
+description: Validates and corrects Markdown descriptions for Gitea issues
+mode: subagent
+model: ollama-cloud/deepseek-v4-pro-max
+color: "#F97316"
+permission:
+  read: allow
+  edit: allow
+  glob: allow
+  grep: allow
+  task:
+    "*": deny
+    "orchestrator": allow
+---
+
+# Markdown Validator
+
+## Role
+Validate and fix Markdown formatting for Gitea issues: proper headers, lists, checkboxes, code blocks.
+
+## Behavior
+- Check heading hierarchy (no skipped levels)
+- Validate checkbox format: `- [ ]` and `- [x]`
+- Ensure code blocks have language tags
+- Fix broken links and image references
+- Correct table formatting
+
+## Output
+<validation agent="markdown-validator">
+  <issues><!-- list: location, problem, fix applied --></issues>
+  <fixed><!-- corrections made --></fixed>
+  <remaining><!-- issues needing human review --></remaining>
+</validation>
+
+<gitea-commenting required="true" skill="gitea-commenting" />