feat(errors): platform-wide request ids + error codes + admin inspector

End-to-end error-handling overhaul. A user hitting any failure now sees
a plain-text message + stable error code + reference id. A super admin
can paste the id into /admin/errors/<id> for the full request shape,
sanitized body, error stack, and a heuristic likely-cause hint.

REQUEST CONTEXT (AsyncLocalStorage)
- src/lib/request-context.ts mints a per-request frame carrying
  requestId + portId + userId + method + path + start timestamp.
- withAuth wraps every authenticated handler in runWithRequestContext
  and accepts an upstream X-Request-Id header (validated shape) or
  generates a fresh UUID. The id ALWAYS leaves on the X-Request-Id
  response header, including early-return 401/403/4xx paths.
- Pino logger reads from the same context via mixin — every log
  line emitted during the request automatically carries the ids
  with no per-call threading.

ERROR CODE REGISTRY
- src/lib/error-codes.ts defines stable DOMAIN_REASON codes with
  HTTP status + plain-text user-facing message (no jargon, written
  for the rep on the phone with a customer).
- New CodedError class wraps a registered code + optional
  internalMessage (admin-only — never sent to client).
- Existing AppError subclasses got plain-text default rewrites so
  legacy throw sites improve immediately without migration.
- High-impact services migrated to specific codes:
  expenses (RECEIPT_REQUIRED, INVOICE_LINKED), interest-berths
  (CROSS_PORT_LINK_REJECTED), berth-pdf (PDF_MAGIC_BYTE / PDF_EMPTY /
  PDF_TOO_LARGE / VERSION_ALREADY_CURRENT), recommender
  (INTEREST_PORT_MISMATCH).

ERROR ENVELOPE
- errorResponse always sets X-Request-Id header + requestId field.
- 5xx responses include a "Quote error ID …" friendly line.
- 4xx kept clean (validation, permission, not-found don't pollute
  the inspector — they're already in audit log).

PERSISTENCE (error_events table, migration 0040)
- One row per 5xx, keyed on requestId, with method/path/status/error
  name+message/stack head (4KB cap)/sanitized body excerpt (1KB cap;
  password/token/secret/etc keys redacted)/duration/IP/UA/metadata.
- captureErrorEvent extracts Postgres SQLSTATE/severity/cause.code
  so the classifier can recognize FK / unique / NOT NULL / schema-
  drift violations.
- Failure to persist is logged-not-thrown.

LIKELY-CULPRIT CLASSIFIER (src/lib/error-classifier.ts)
- 4-pass heuristic (first match wins):
  1. Postgres SQLSTATE → human reason (23503 FK, 23505 unique,
     42703 schema drift, 53300 connection limit, …)
  2. Error class name (AbortError, TimeoutError, FetchError,
     ZodError)
  3. Stack-path patterns (/lib/storage/, /lib/email/, documenso,
     openai|claude, /queue/workers/)
  4. Free-text message keywords (econnrefused, rate limit, timeout,
     unauthorized|invalid api key)
- Returns { label, hint, subsystem } for the inspector badge.

CLIENT SIDE
- apiFetch throws structured ApiError with message + code + requestId
  + details + retryAfter.
- toastError() helper renders the standard 3-line toast:
  plain message / Error code: X / Reference ID: Y [Copy ID].

ADMIN INSPECTOR
- /<port>/admin/errors lists captured 5xx with status badge + path +
  likely-culprit badge + truncated message + reference id. Filter by
  status code; auto-refresh via TanStack Query.
- /<port>/admin/errors/<requestId> deep-dive: request shape, full
  error name+message+stack, sanitized body excerpt, raw metadata,
  registered-code lookup (so admin can compare to what user saw),
  likely-culprit hint with subsystem tag.
- /<port>/admin/errors/codes is the in-app code reference page —
  every registered code grouped by domain prefix, searchable, with
  HTTP status + user message inline. Linked from inspector header
  so admins can flip to it while triaging.
- Permission: admin.view_audit_log. Super admins see all ports;
  regular admins port-scoped.
- system-monitoring dashboard now surfaces error_events alongside
  permission_denied audit + queue failed jobs (RecentError gains
  source: 'request' variant).

DOCS
- docs/error-handling.md walks through coded errors, plain-text
  message guidelines, client toasting, admin inspector usage,
  persistence rules, classifier internals, pruning, and the
  legacy → CodedError migration path.

MIGRATION SAFETY
- Audit confirmed all 41 migrations (0000-0040) apply cleanly in
  journal order against an empty DB. 0040 references ports(id)
  which exists from 0000. 0035/0038 don't deadlock under sequential
  psql -f. Removed redundant idx_ds_sent_by from 0038 (created in
  0037).

Tests: 1168/1168 vitest passing. tsc clean.
- security-error-responses tests updated for plain-text messages
  + new optional response keys (code/requestId/message).
- berth-pdf-versions tests assert stable error codes via
  toMatchObject({ code }) rather than message regex.

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

src/lib/services/system-monitoring.service.ts

@@ -1,5 +1,5 @@
 import { db } from '@/lib/db';
-import { auditLogs } from '@/lib/db/schema';
+import { auditLogs, errorEvents } from '@/lib/db/schema';
 import { redis } from '@/lib/redis';
 import { minioClient } from '@/lib/minio/index';
 import { getQueue, QUEUE_CONFIGS, type QueueName } from '@/lib/queue';
@@ -56,10 +56,17 @@ export interface ConnectionStatus {
 
 export interface RecentError {
   id: string;
-  source: 'audit' | 'queue';
+  source: 'audit' | 'queue' | 'request';
   message: string;
   timestamp: Date;
   metadata?: Record<string, unknown>;
+  /** Set for `source: 'request'` rows so the UI can deep-link to
+   *  /admin/errors/<requestId>. */
+  requestId?: string;
+  /** Set for `source: 'request'` rows. */
+  statusCode?: number;
+  /** Set for `source: 'request'` rows. */
+  errorCode?: string | null;
 }
 
 // ─── Timeout helper ───────────────────────────────────────────────────────────
@@ -364,8 +371,42 @@ export async function getRecentErrors(limit = 20): Promise<RecentError[]> {
     .filter((r): r is PromiseFulfilledResult<RecentError[]> => r.status === 'fulfilled')
     .flatMap((r) => r.value);
 
+  // Captured 5xx requests from the per-request error_events table —
+  // this is the deepest source: full stack head + body excerpt + path.
+  // The dedicated /admin/errors page paginates this; here we surface
+  // the most recent for the dashboard.
+  const requestErrorRows = await db
+    .select({
+      requestId: errorEvents.requestId,
+      statusCode: errorEvents.statusCode,
+      method: errorEvents.method,
+      path: errorEvents.path,
+      errorName: errorEvents.errorName,
+      errorMessage: errorEvents.errorMessage,
+      metadata: errorEvents.metadata,
+      createdAt: errorEvents.createdAt,
+    })
+    .from(errorEvents)
+    .orderBy(desc(errorEvents.createdAt))
+    .limit(limit);
+
+  const requestErrors: RecentError[] = requestErrorRows.map((row) => {
+    const meta = (row.metadata as Record<string, unknown>) ?? {};
+    return {
+      id: row.requestId,
+      source: 'request' as const,
+      message:
+        `${row.method} ${row.path} → ${row.statusCode} ${row.errorMessage ?? row.errorName ?? ''}`.trim(),
+      timestamp: row.createdAt,
+      metadata: meta,
+      requestId: row.requestId,
+      statusCode: row.statusCode,
+      errorCode: typeof meta.code === 'string' ? meta.code : null,
+    };
+  });
+
   // Merge and sort combined list by timestamp descending
-  const combined = [...auditResults, ...queueErrors].sort(
+  const combined = [...auditResults, ...queueErrors, ...requestErrors].sort(
     (a, b) => b.timestamp.getTime() - a.timestamp.getTime(),
   );