Contract-first API with DTOs, validation, and server-side OpenAPI post-processing

Add dedicated request/response DTOs for all controllers, replacing raw
JsonNode parameters with validated types. Move OpenAPI path-prefix stripping
and ProcessorNode children injection into OpenApiCustomizer beans so the
spec served at /api/v1/api-docs is already clean — eliminating the need for
the ui/scripts/process-openapi.mjs post-processing script.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/admin/OidcAdminPage.tsx

@@ -5,8 +5,8 @@ import {
   useSaveOidcConfig,
   useTestOidcConnection,
   useDeleteOidcConfig,
-  type OidcConfigRequest,
 } from '../../api/queries/oidc-admin';
+import type { OidcAdminConfigRequest } from '../../api/types';
 import styles from './OidcAdminPage.module.css';
 
 interface FormData {
@@ -87,7 +87,7 @@ function OidcAdminForm() {
   }
 
   async function handleSave() {
-    const payload: OidcConfigRequest = {
+    const payload: OidcAdminConfigRequest = {
       ...form,
       clientSecret: secretTouched ? form.clientSecret : '********',
     };

ui/src/pages/executions/ExchangeDetail.tsx

@@ -1,5 +1,5 @@
 import { useProcessorSnapshot } from '../../api/queries/executions';
-import type { ExecutionSummary } from '../../api/schema-types';
+import type { ExecutionSummary } from '../../api/types';
 import styles from './ExchangeDetail.module.css';
 
 interface ExchangeDetailProps {

ui/src/pages/executions/ProcessorTree.tsx

@@ -1,5 +1,5 @@
 import { useExecutionDetail } from '../../api/queries/executions';
-import type { ProcessorNode as ProcessorNodeType } from '../../api/schema-types';
+import type { ProcessorNode as ProcessorNodeType } from '../../api/types';
 import styles from './ProcessorTree.module.css';
 
 const ICON_MAP: Record<string, { label: string; className: string }> = {

ui/src/pages/executions/ResultsTable.tsx

@@ -1,5 +1,5 @@
 import { useState, useMemo } from 'react';
-import type { ExecutionSummary } from '../../api/schema-types';
+import type { ExecutionSummary } from '../../api/types';
 import { StatusPill } from '../../components/shared/StatusPill';
 import { DurationBar } from '../../components/shared/DurationBar';
 import { AppBadge } from '../../components/shared/AppBadge';

ui/src/pages/executions/SearchFilters.tsx

@@ -7,7 +7,7 @@ import { ScopeTabs } from '../../components/command-palette/ScopeTabs';
 import { ResultsList } from '../../components/command-palette/ResultsList';
 import { PaletteFooter } from '../../components/command-palette/PaletteFooter';
 import { FilterChip } from '../../components/shared/FilterChip';
-import type { ExecutionSummary, AgentInstance } from '../../api/schema-types';
+import type { ExecutionSummary, AgentInstance } from '../../api/types';
 import styles from './SearchFilters.module.css';
 
 export function SearchFilters() {

ui/src/pages/executions/use-execution-search.ts

@@ -1,5 +1,5 @@
 import { create } from 'zustand';
-import type { SearchRequest } from '../../api/schema-types';
+import type { SearchRequest } from '../../api/types';
 
 function todayMidnight(): string {
   const d = new Date();