chore(server): auto-format Rust code (cargo fmt)

Pre-existing formatting issues in generator_spike.rs and
validate_ron.rs caught by the new pre-push lint hook.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/bin/generator_spike.rs

@@ -1061,7 +1061,9 @@ fn main() {
                     "Unknown zone type: '{}'. Use 'rural' or 'industrial'.",
                     other
                 );
-                eprintln!("(Phase 2 with --from-files supports zone-type IDs like 'rural_agricultural')");
+                eprintln!(
+                    "(Phase 2 with --from-files supports zone-type IDs like 'rural_agricultural')"
+                );
                 process::exit(1);
             }
         };

server/src/bin/validate_ron.rs

@@ -111,7 +111,10 @@ fn main() {
         },
         "zone_type" => match ron::from_str::<ZoneTypeTemplate>(&content) {
             Ok(template) => {
-                println!("Valid ZoneTypeTemplate: {} ({})", template.label, template.id);
+                println!(
+                    "Valid ZoneTypeTemplate: {} ({})",
+                    template.label, template.id
+                );
                 println!(
                     "  {} roles, {} social site types",
                     template.roles.len(),
@@ -122,14 +125,10 @@ 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();
+                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!(
-                            "  WARNING: role '{}' has no behavior_primitives",
-                            role.id
-                        );
+                        eprintln!("  WARNING: role '{}' has no behavior_primitives", role.id);
                         warnings += 1;
                     }
                 }