feat(audit): platform-api audit log + operator UI wired to real events

Phase 1 of the audit work — capture everything we control today, ingest from
external systems (Authentik / OCIS / Stalwart) in a later phase. The mock
OP_AUDIT fixture is gone; both the /audit page and Overview's activity card
now show real events recorded by AuditService.record() in platform-api.

Schema (services/platform-api/src/schemas/audit-event.schema.ts):
  AuditEvent { at, actorType, actorId, actorEmail, actorIp, action, outcome,
    resourceType, resourceId, resourceName, tenantSlug, partnerSlug, source,
    metadata, prevHash, hash }
  Indexes: {at:-1}, {tenantSlug,at:-1}, {actorId,at:-1}, {action,at:-1}.
  prevHash/hash are nullable now; hash-chain tamper evidence is a later phase.

AuditService:
  - record() — best-effort write, swallows errors so the underlying mutation
    that succeeded isn't failed by a downstream log issue. Surfaces failures
    via Logger.
  - list() — filters: since/until/before, action (exact OR prefix match
    via leading-anchor regex), tenantSlug, partnerSlug, actorEmail, outcome,
    free-text q across action/resourceName/actorEmail/tenantSlug, limit
    (default 100, max 500). Cursor pagination via `before`.
  - No UPDATE/DELETE surface — entries are append-only by construction.

AuditController: GET /audit, behind JwtAuthGuard + OperatorGuard. No mutations
exposed; entries written internally by other modules.

X-Forwarded-For threading:
  - apps/operator/server/utils/platform-api.ts forwards the originating
    client IP to platform-api so audit entries carry a real address.
  - services/platform-api/src/auth/client-ip.ts extracts leftmost
    X-Forwarded-For, falls back to socket.remoteAddress.

Instrumented mutations (every one threads actor + IP through):
  Tenants: create, update, softDelete, setStatus(suspend/resume)
  Partners: create, update, terminate
  Flags:   create, update (incl. flag.killed verb when state=off+note=kill-switch),
           remove
  Users:   deactivate

Each controller resolves the User doc via ActorService, extracts IP via
clientIp(req), and passes { userId, email, ip } as AuditActor to the service.
FlagsService's local ActorRef collapses to AuditActor so flag history and the
audit log share one shape.

Operator UI:
  - /api/audit proxy that forwards query params verbatim
  - types/audit.ts
  - pages/audit.vue: real list with quick-pick action chips (All/Tenants/
    Partners/Flags/Users), outcome filter, free-text search, "Load older
    events" cursor pagination
  - pages/index.vue: Overview activity card swaps mock OP_AUDIT for the
    same /api/audit endpoint, rows link into /audit
  - data/fixtures.ts: OP_AUDIT / AuditEntry / AuditTone exports removed

Verified end-to-end: suspended + resumed acme, flipped oci_versioning through
rollout → kill → on, then /audit returned all 5 events with the right action
verbs (tenant.suspended, tenant.resumed, flag.updated, flag.killed,
flag.updated), actor admin@dezky.local, IP 192.168.65.1. Filters (action
prefix + free-text q) narrow correctly.

Out of scope for this commit (each gets its own conversation):
  - Authentik / OCIS / Stalwart ingest adapters (Phase 2)
  - Hash-chain tamper evidence (Phase 3)
  - TTL + cold-storage archival to Hetzner Object Storage (Phase 4)
  - GDPR right-to-erasure tooling

services/platform-api/src/partners/partners.controller.ts

@@ -7,14 +7,31 @@ import {
   Param,
   Patch,
   Post,
+  Req,
   UseGuards,
 } from '@nestjs/common'
+import { ActorService } from '../auth/actor.service.js'
+import { clientIp } from '../auth/client-ip.js'
+import { CurrentUser } from '../auth/current-user.decorator.js'
 import { JwtAuthGuard } from '../auth/jwt-auth.guard.js'
 import { OperatorGuard } from '../auth/operator.guard.js'
+import type { AuthentikJwtPayload } from '../auth/jwt-payload.interface.js'
+import type { AuditActor } from '../audit/audit.service.js'
 import { CreatePartnerDto } from './dto/create-partner.dto.js'
 import { UpdatePartnerDto } from './dto/update-partner.dto.js'
 import { PartnersService } from './partners.service.js'
 
+function auditActor(
+  user: { _id: unknown; email: string },
+  req: Parameters<typeof clientIp>[0],
+): AuditActor {
+  return {
+    userId: String(user._id),
+    email: user.email,
+    ip: clientIp(req),
+  }
+}
+
 // Partners are operator-managed only. Every endpoint requires an
 // operator-scoped token (aud === 'dezky-operator') plus platformAdmin on the
 // resolved user. A self-serve partner portal (partner.dezky.local) is a
@@ -23,11 +40,19 @@ import { PartnersService } from './partners.service.js'
 @Controller('partners')
 @UseGuards(JwtAuthGuard, OperatorGuard)
 export class PartnersController {
-  constructor(private readonly partners: PartnersService) {}
+  constructor(
+    private readonly partners: PartnersService,
+    private readonly actorService: ActorService,
+  ) {}
 
   @Post()
-  create(@Body() dto: CreatePartnerDto) {
-    return this.partners.create(dto)
+  async create(
+    @Body() dto: CreatePartnerDto,
+    @CurrentUser() jwt: AuthentikJwtPayload,
+    @Req() req: Parameters<typeof clientIp>[0],
+  ) {
+    const user = await this.actorService.resolve(jwt)
+    return this.partners.create(dto, auditActor(user, req))
   }
 
   @Get()
@@ -48,13 +73,24 @@ export class PartnersController {
   }
 
   @Patch(':slug')
-  update(@Param('slug') slug: string, @Body() dto: UpdatePartnerDto) {
-    return this.partners.update(slug, dto)
+  async update(
+    @Param('slug') slug: string,
+    @Body() dto: UpdatePartnerDto,
+    @CurrentUser() jwt: AuthentikJwtPayload,
+    @Req() req: Parameters<typeof clientIp>[0],
+  ) {
+    const user = await this.actorService.resolve(jwt)
+    return this.partners.update(slug, dto, auditActor(user, req))
   }
 
   @Delete(':slug')
   @HttpCode(204)
-  async terminate(@Param('slug') slug: string) {
-    await this.partners.terminate(slug)
+  async terminate(
+    @Param('slug') slug: string,
+    @CurrentUser() jwt: AuthentikJwtPayload,
+    @Req() req: Parameters<typeof clientIp>[0],
+  ) {
+    const user = await this.actorService.resolve(jwt)
+    await this.partners.terminate(slug, auditActor(user, req))
   }
 }