feat(core-audit): scaffold optional package (no impls yet)

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

packages/core-audit/AGENTS.md

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+# @repo/core-audit
+
+Optional core package providing DPA-compliant audit logging. Scaffold via `pnpm turbo gen core-package audit`.
+
+## Structure
+
+```
+src/
+  audit-log.interface.ts          # IAuditLog extends AuditLogProtocol
+  audit-logs-collection.ts        # Payload collection (append-only)
+  noop-audit-log.ts               # NoopAuditLog
+  payload-audit-log.ts            # PayloadAuditLog (local cache impl)
+  stdout-json-audit-log.ts        # StdoutJsonAuditLog (log-shipper sink)
+  multi-sink-audit-log.ts         # MultiSinkAuditLog (fan-out wrapper)
+  trace-id-enriching-audit-log.ts # OTel correlation decorator
+  pseudonymize.ts                 # sha256-with-salt for GDPR pseudonymization
+  di/bind-audit.ts                # bindAudit binder
+  integrations/api/router.ts      # admin tRPC procedure
+  hooks/                          # Payload hook factories
+```
+
+## Compliance posture
+
+- `AuditEntry` type (in `@repo/core-shared/audit`) has no `payload`/`body`/`oldValue`/`newValue` fields — type system enforces DPA "what NOT to log".
+- Append-only Payload collection (`update: () => false`); erasure uses `overrideAccess: true` for the privileged path.
+- `AUDIT_PSEUDONYM_SALT` env REQUIRED in production. Validated at bind time.
+
+See `docs/guides/audit-and-compliance.md` for the full guide.

packages/core-audit/eslint.config.js

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+import baseConfig from "@repo/core-eslint/base";
+
+export default baseConfig;

packages/core-audit/package.json

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+{
+  "name": "@repo/core-audit",
+  "version": "0.0.1",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./src/index.ts",
+    "./collection": "./src/audit-logs-collection.ts",
+    "./di": "./src/di/bind-audit.ts",
+    "./hooks": "./src/hooks/index.ts",
+    "./api": "./src/integrations/api/router.ts"
+  },
+  "scripts": {
+    "build": "tsc --noEmit",
+    "lint": "eslint .",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@repo/core-shared": "workspace:*",
+    "@trpc/server": "^11.0.0",
+    "zod": "^3.23.0"
+  },
+  "peerDependencies": {
+    "payload": "^3.0.0"
+  },
+  "peerDependenciesMeta": {
+    "payload": { "optional": true }
+  },
+  "devDependencies": {
+    "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
+    "@repo/core-typescript": "workspace:*",
+    "inversify": "^6.2.0",
+    "payload": "^3.14.0",
+    "reflect-metadata": "^0.2.2",
+    "typescript": "^5.8.0",
+    "vitest": "^3.0.0"
+  }
+}

packages/core-audit/tsconfig.json

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+{
+  "extends": "@repo/core-typescript/base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": ".",
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": ["**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}

packages/core-audit/turbo.json

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+{
+  "extends": ["//"],
+  "tags": ["core"]
+}

packages/core-audit/vitest.config.ts

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+import path from "node:path";
+import { mergeConfig } from "vitest/config";
+import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
+
+export default mergeConfig(nodeVitestConfig, {
+  resolve: {
+    alias: { "@": path.resolve(__dirname, "./src") },
+  },
+});