fix(simulation): apply PR #94 review suggestions

- validate_ron: add eligible_roles referential integrity check against
  defined RoleSpec.id values in zone-type templates
- v01-yaml-content-audit.md: fix grep path from data/templates to
  server/data/templates in the superseded-files verification command
- pre-commit hook: comment out nonexistent check-decision-ids script
  to stop per-commit warnings until the script is implemented

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/bin/validate_ron.rs

@@ -122,6 +122,8 @@ fn main() {
                     eprintln!("  WARNING: no roles defined — generator will reject this");
                     warnings += 1;
                 }
+                let role_ids: Vec<&str> =
+                    template.roles.iter().map(|r| r.id.as_str()).collect();
                 for role in &template.roles {
                     if role.behavior_primitives.is_empty() {
                         eprintln!(
@@ -131,6 +133,17 @@ fn main() {
                         warnings += 1;
                     }
                 }
+                for site in &template.social_site_types {
+                    for eligible in &site.eligible_roles {
+                        if !role_ids.contains(&eligible.as_str()) {
+                            eprintln!(
+                                "  WARNING: social site '{}' references eligible_role '{}' which is not a defined role",
+                                site.site_type, eligible
+                            );
+                            warnings += 1;
+                        }
+                    }
+                }
                 if warnings > 0 {
                     process::exit(1);
                 }