docs: Update documentation for constraint management feature

- Update ROADMAP.md with constraint management progress
- Update README.md with constraint manager feature
- Update TESTING.md with constraint test coverage (93 total tests)
- Fix linting issues in constraints API and featureConfig
- All 40 unit tests passing

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

src/app/api/admin/constraints/route.ts

@@ -5,7 +5,7 @@ import { getSession } from '@/utils/session';
 
 // Validate identifier format (prevent SQL injection)
 function isValidIdentifier(name: string): boolean {
-  return /^[a-zA-Z_][a-zA-Z0-9_]*$/.test(name);
+  return /^[a-z_]\w*$/i.test(name);
 }
 
 // Validate table exists

src/utils/featureConfig.ts

@@ -57,7 +57,7 @@ export function getConstraintTypes(): ConstraintType[] {
 }
 
 export function getNavItems(): NavItem[] {
-  return featuresConfig.navItems.filter(item => {
+  return featuresConfig.navItems.filter((item) => {
     const feature = getFeatureById(item.featureId);
     return feature && feature.enabled;
   });