tool: add layer architecture boundary lint rule (#10109)

## Summary
- Add `import-x/no-restricted-paths` ESLint rule enforcing the `base →
platform → workbench → renderer` layer hierarchy
- Set to `error` with eslint-disable comments on existing violations
(~11 suppressions)
- Consolidate zone definitions using array syntax for `from`/`target`
- Add `layer-audit` Claude skill for auditing violations
- Fix knip false positive for `zod` dependency in ingest-types

## Context
Ref:
https://github.com/Comfy-Org/ComfyUI_frontend/pull/10021#discussion_r2939392141

The codebase is migrating toward a layered architecture. This adds
static enforcement so new violations are caught in PR CI.

### Layer rules
| Layer | Can import from |
|---|---|
| `base/` | nothing |
| `platform/` | `base/` |
| `workbench/` | `platform/`, `base/` |
| `renderer/` | `workbench/`, `platform/`, `base/` |

### Current violations (pre-existing, suppressed with eslint-disable)
| Direction | Count |
|---|---|
| base → platform | 2 |
| platform → workbench | 3 |
| platform → renderer | 5 |
| workbench → renderer | 1 |

## Test plan
- [x] `pnpm lint` passes (0 errors, 0 warnings)
- [x] `pnpm typecheck` passes
- [x] `pnpm knip` passes
- [ ] CI green

---------

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

src/platform/missingModel/missingModelScan.ts

@@ -10,6 +10,7 @@ import type {
 } from './types'
 import { getAssetFilename } from '@/platform/assets/utils/assetMetadataUtils'
 import type { AssetItem } from '@/platform/assets/schemas/assetSchema'
+// eslint-disable-next-line import-x/no-restricted-paths
 import { getSelectedModelsMetadata } from '@/workbench/utils/modelMetadataUtil'
 import type { LGraph } from '@/lib/litegraph/src/LGraph'
 import type {