test(ci): stabilize attachment fixtures

packages/api/session-controller/tests/test-remote.ts

@@ -3,7 +3,11 @@
 import { SessionLogOffset } from '@deepseek-ai/dsh-session'
 import type { Context } from '@deepseek-ai/cordis'
 import type { ModelSelection as AgentModelSelection } from '@deepseek-ai/dsh-agent'
-import type { AdmittedPromptContentPart, AttachmentAdmissionPart } from '@deepseek-ai/dsh-attachment'
+import type {
+  AdmittedPromptContentPart,
+  AttachmentAdmissionPart,
+  ImageAttachmentLimits,
+} from '@deepseek-ai/dsh-attachment'
 import type { SessionEvent, SessionHeader, SessionId } from '@deepseek-ai/dsh-session'
 import {
   SessionPersistenceNotFoundError,
@@ -94,6 +98,15 @@ export interface TestSessionRemoteDefaults {
 
 const installed = new WeakMap<Context, SessionController>()
 
+const TEST_IMAGE_LIMITS: ImageAttachmentLimits = Object.freeze({
+  maxImageBytes: 5 * 1024 * 1024,
+  maxImagesPerMessage: 20,
+  maxMessageImageBytes: 100 * 1024 * 1024,
+  maxImagePixels: 40_000_000,
+  maxImageDimension: 2000,
+  mediaTypes: Object.freeze(['image/png'] as const),
+})
+
 /** Compact header-and-events point read a persistence double declares per session. */
 interface TestSessionInspection {
   readonly meta: SessionHeader
@@ -239,6 +252,7 @@ function installControllers(
   }
   if (ctx.get('attachments') === undefined) {
     ctx.provide('attachments', {
+      imageLimits: TEST_IMAGE_LIMITS,
       admitPromptContent: async (
         content: readonly AttachmentAdmissionPart[],
       ): Promise<AdmittedPromptContentPart[]> => {