feat(eslint-config): add boundaries plugin enforcing app→feature→core graph

- Install eslint-plugin-boundaries@^4.2.2 to enforce three-tag boundary model
- Configure element types: app, core-composition (core-api/core-cms), core, feature, tooling
- Enforce unidirectional dependency graph: apps→features→core, core-composition→features
- Add eslint.config.js to all 17 packages and apps (required for ESLint 9 flat config)
- Fix pre-existing linting issues to achieve clean lint pass

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pnpm-lock.yaml

@@ -460,6 +460,9 @@ importers:
       eslint-config-prettier:
         specifier: ^10.1.0
         version: 10.1.8(eslint@9.39.4(jiti@2.6.1))
+      eslint-plugin-boundaries:
+        specifier: ^4.2.2
+        version: 4.2.2(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.4(jiti@2.6.1))
       eslint-plugin-turbo:
         specifier: ^2.4.0
         version: 2.9.4(eslint@9.39.4(jiti@2.6.1))(turbo@2.9.4)
@@ -2819,6 +2822,14 @@ packages:
   dateformat@4.6.3:
     resolution: {integrity: sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==}
 
+  debug@3.2.7:
+    resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+
   debug@4.4.3:
     resolution: {integrity: sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==}
     engines: {node: '>=6.0'}
@@ -3053,6 +3064,36 @@ packages:
     peerDependencies:
       eslint: '>=7.0.0'
 
+  eslint-import-resolver-node@0.3.9:
+    resolution: {integrity: sha512-WFj2isz22JahUv+B788TlO3N6zL3nNJGU8CcZbPZvVEkBPaJdCV4vy5wyghty5ROFbCRnm132v8BScu5/1BQ8g==}
+
+  eslint-module-utils@2.8.1:
+    resolution: {integrity: sha512-rXDXR3h7cs7dy9RNpUlQf80nX31XWJEyGq1tRMo+6GsO5VmTe4UTwtmonAD4ZkAsrfMVDA2wlGJ3790Ys+D49Q==}
+    engines: {node: '>=4'}
+    peerDependencies:
+      '@typescript-eslint/parser': '*'
+      eslint: '*'
+      eslint-import-resolver-node: '*'
+      eslint-import-resolver-typescript: '*'
+      eslint-import-resolver-webpack: '*'
+    peerDependenciesMeta:
+      '@typescript-eslint/parser':
+        optional: true
+      eslint:
+        optional: true
+      eslint-import-resolver-node:
+        optional: true
+      eslint-import-resolver-typescript:
+        optional: true
+      eslint-import-resolver-webpack:
+        optional: true
+
+  eslint-plugin-boundaries@4.2.2:
+    resolution: {integrity: sha512-cjwpZqkCXgfz953bc74uDetOtGVxwgMgNZ7hAKi6Oxck+x4oY6Z/9DzgPqAYhtQdSNHFVg+vhft/lSL+snPMQg==}
+    engines: {node: '>=14.0.0'}
+    peerDependencies:
+      eslint: '>=6.0.0'
+
   eslint-plugin-turbo@2.9.4:
     resolution: {integrity: sha512-8gIBw+QC7jLOjYLthoLYcDGf0pEefAukkMAl60exv3HkS3NO7AuXzzFjY3iDGDc4s5mbkC6f/692DCdb3XHwMg==}
     peerDependencies:
@@ -3721,6 +3762,10 @@ packages:
   micromark@4.0.2:
     resolution: {integrity: sha512-zpe98Q6kvavpCr1NPVSCMebCKfD7CA2NqZ+rykeNhONIJBpc1tFKt9hucLGwha3jNTNI8lHpctWJWoimVF4PfA==}
 
+  micromatch@4.0.7:
+    resolution: {integrity: sha512-LPP/3KorzCwBxfeUuZmaR6bG2kdeHSbe0P2tY3FLRU4vYrjYz5hI4QZwV0njUx3jeuKe67YukQ1LSPZBKDqO/Q==}
+    engines: {node: '>=8.6'}
+
   minimatch@10.2.5:
     resolution: {integrity: sha512-MULkVLfKGYDFYejP07QOurDLLQpcjk7Fw+7jXS2R2czRQzR56yHRveU5NDJEOviH+hETZKSkIk5c+T23GjFUMg==}
     engines: {node: 18 || 20 || >=22}
@@ -6976,6 +7021,10 @@ snapshots:
 
   dateformat@4.6.3: {}
 
+  debug@3.2.7:
+    dependencies:
+      ms: 2.1.3
+
   debug@4.4.3:
     dependencies:
       ms: 2.1.3
@@ -7174,6 +7223,37 @@ snapshots:
     dependencies:
       eslint: 9.39.4(jiti@2.6.1)
 
+  eslint-import-resolver-node@0.3.9:
+    dependencies:
+      debug: 3.2.7
+      is-core-module: 2.16.1
+      resolve: 1.22.11
+    transitivePeerDependencies:
+      - supports-color
+
+  eslint-module-utils@2.8.1(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.4(jiti@2.6.1)):
+    dependencies:
+      debug: 3.2.7
+    optionalDependencies:
+      '@typescript-eslint/parser': 8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3)
+      eslint: 9.39.4(jiti@2.6.1)
+      eslint-import-resolver-node: 0.3.9
+    transitivePeerDependencies:
+      - supports-color
+
+  eslint-plugin-boundaries@4.2.2(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint@9.39.4(jiti@2.6.1)):
+    dependencies:
+      chalk: 4.1.2
+      eslint: 9.39.4(jiti@2.6.1)
+      eslint-import-resolver-node: 0.3.9
+      eslint-module-utils: 2.8.1(@typescript-eslint/parser@8.58.0(eslint@9.39.4(jiti@2.6.1))(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.4(jiti@2.6.1))
+      micromatch: 4.0.7
+    transitivePeerDependencies:
+      - '@typescript-eslint/parser'
+      - eslint-import-resolver-typescript
+      - eslint-import-resolver-webpack
+      - supports-color
+
   eslint-plugin-turbo@2.9.4(eslint@9.39.4(jiti@2.6.1))(turbo@2.9.4):
     dependencies:
       dotenv: 16.0.3
@@ -7930,6 +8010,11 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  micromatch@4.0.7:
+    dependencies:
+      braces: 3.0.3
+      picomatch: 2.3.2
+
   minimatch@10.2.5:
     dependencies:
       brace-expansion: 5.0.5