Add missing template for methodology analysis state file block message

The template was referenced in loop-common.sh but never created, causing
the CI template-references test to fail.

Author: SihaoLiu

prompt-template/block/methodology-analysis-state-file-modification.md

@@ -0,0 +1,9 @@
+# Methodology Analysis State File Modification Blocked
+
+You cannot modify `methodology-analysis-state.md`. This file is managed by the loop system during the Methodology Analysis Phase.
+
+The Methodology Analysis Phase runs before the loop fully exits. Focus on:
+1. Spawning an Opus agent to analyze development records
+2. Reviewing the sanitized analysis report
+3. Optionally helping the user file a GitHub issue with improvement suggestions
+4. Writing your completion marker to `methodology-analysis-done.md`