chore(ai): add proto-generated graphql schema reference

Python service needs strawberry-graphql federation implementation

services/ai/src/graphql/generated/schema.graphql

@@ -0,0 +1,141 @@
+# 自动生成的 GraphQL Federation 子图（v2.1 M0）
+# 源文件：ai.proto
+# 请勿手动修改；如需调整，改 proto 后重新运行 pnpm run proto:gen-graphql
+
+extend type Query
+
+type GeneratedReport @key(fields: "id") {
+  id: String
+  content: String
+  summary: String
+  recommendations: String
+  degraded: Boolean
+  degraded_reason: String
+}
+
+input ChatRequestInput {
+  messages: ChatMessage
+  model: String
+  temperature: Float
+  user_id: String
+  session_id: String
+  data_scope: String
+}
+
+type ChatMessage {
+  role: String
+  content: String
+}
+
+input ChatResponseInput {
+  content: String
+  model: String
+  usage: Usage
+  degraded: Boolean
+  degraded_reason: String
+}
+
+type Usage {
+  prompt_tokens: Int
+  completion_tokens: Int
+  total_tokens: Int
+  latency_ms: Int
+}
+
+type ChatChunk {
+  content: String
+  done: Boolean
+}
+
+input GenerateQuestionRequestInput {
+  prompt: String
+  subject: String
+  difficulty: String
+  grade: String
+  knowledge_point_ids: String
+  question_type: String
+  count: Int
+}
+
+type GeneratedQuestion {
+  question: String
+  answer: String
+  explanation: String
+  question_type: String
+  difficulty: String
+  knowledge_point_ids: String
+  evaluation_score: Float
+  degraded: Boolean
+  degraded_reason: String
+}
+
+type GeneratedQuestionChunk {
+  content: String
+  done: Boolean
+  complete_question: GeneratedQuestion
+}
+
+input OptimizeExpressionRequestInput {
+  text: String
+  context: String
+}
+
+type OptimizedExpression {
+  optimized: String
+  suggestions: String
+  degraded: Boolean
+  degraded_reason: String
+}
+
+input GenerateLessonPlanRequestInput {
+  class_id: String
+  subject_id: String
+  topic: String
+  target_difficulty: String
+  question_count: Int
+  user_id: String
+  data_scope: String
+}
+
+input LessonPlanResponseInput {
+  workflow_id: String
+  status: String
+  estimated_completion_seconds: Int
+  degraded: Boolean
+  degraded_reason: String
+}
+
+input GetLessonPlanStatusRequestInput {
+  workflow_id: String
+}
+
+type LessonPlanStatus {
+  workflow_id: String
+  status: String
+  questions: GeneratedQuestion
+  error: String
+  degraded: Boolean
+  degraded_reason: String
+}
+
+input ConfirmLessonPlanRequestInput {
+  workflow_id: String
+}
+
+type ConfirmResult {
+  success: Boolean
+  persisted_question_ids: String
+  error: String
+}
+
+input GenerateReportRequestInput {
+  class_id: String
+  report_type: String
+  student_id: String
+  user_id: String
+  data_scope: String
+}
+
+extend type Query {
+  lessonPlanStatus: LessonPlanStatus
+}