feat!: scope per-app config and settings by environment

BREAKING: wipe dev PostgreSQL before deploying — V1 checksum changes.
Agents must now send environmentId on registration (400 if missing).

Two tables previously keyed on app name alone caused cross-environment
data bleed: writing config for (app=X, env=dev) would overwrite the row
used by (app=X, env=prod) agents, and agent startup fetches ignored env
entirely.

- V1 schema: application_config and app_settings are now PK (app, env).
- Repositories: env-keyed finders/saves; env is the authoritative column,
  stamped on the stored JSON so the row agrees with itself.
- ApplicationConfigController.getConfig is dual-mode — AGENT role uses
  JWT env claim (agents cannot spoof env); non-agent callers provide env
  via ?environment= query param.
- AppSettingsController endpoints now require ?environment=.
- SensitiveKeysAdminController fan-out iterates (app, env) slices so each
  env gets its own merged keys.
- DiagramController ingestion stamps env on TaggedDiagram; ClickHouse
  route_diagrams INSERT + findProcessorRouteMapping are env-scoped.
- AgentRegistrationController: environmentId is required on register;
  removed all "default" fallbacks from register/refresh/heartbeat auto-heal.
- UI hooks (useApplicationConfig, useProcessorRouteMapping, useAppSettings,
  useAllAppSettings, useUpdateAppSettings) take env, wired to
  useEnvironmentStore at all call sites.
- New ConfigEnvIsolationIT covers env-isolation for both repositories.

Plan in docs/superpowers/plans/2026-04-16-environment-scoping.md.

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

ui/src/api/queries/dashboard.ts

@@ -115,6 +115,7 @@ export function usePunchcard(application?: string, environment?: string) {
 
 export interface AppSettings {
   appId: string;
+  environment: string;
   slaThresholdMs: number;
   healthErrorWarn: number;
   healthErrorCrit: number;
@@ -124,19 +125,22 @@ export interface AppSettings {
   updatedAt: string;
 }
 
-export function useAppSettings(appId?: string) {
+export function useAppSettings(appId?: string, environment?: string) {
   return useQuery({
-    queryKey: ['app-settings', appId],
-    queryFn: () => fetchJson<AppSettings>(`/admin/app-settings/${appId}`),
-    enabled: !!appId,
+    queryKey: ['app-settings', appId, environment],
+    queryFn: () => fetchJson<AppSettings>(
+      `/admin/app-settings/${appId}?environment=${encodeURIComponent(environment!)}`),
+    enabled: !!appId && !!environment,
     staleTime: 60_000,
   });
 }
 
-export function useAllAppSettings() {
+export function useAllAppSettings(environment?: string) {
   return useQuery({
-    queryKey: ['app-settings', 'all'],
-    queryFn: () => fetchJson<AppSettings[]>('/admin/app-settings'),
+    queryKey: ['app-settings', 'all', environment],
+    queryFn: () => fetchJson<AppSettings[]>(
+      `/admin/app-settings?environment=${encodeURIComponent(environment!)}`),
+    enabled: !!environment,
     staleTime: 60_000,
   });
 }
@@ -144,13 +148,15 @@ export function useAllAppSettings() {
 export function useUpdateAppSettings() {
   const queryClient = useQueryClient();
   return useMutation({
-    mutationFn: async ({ appId, settings }: { appId: string; settings: Omit<AppSettings, 'appId' | 'createdAt' | 'updatedAt'> }) => {
-      const token = useAuthStore.getState().accessToken;
-      const res = await fetch(`${config.apiBaseUrl}/admin/app-settings/${appId}`, {
-        method: 'PUT',
-        headers: { ...authHeaders(), 'Content-Type': 'application/json' },
-        body: JSON.stringify(settings),
-      });
+    mutationFn: async ({ appId, environment, settings }:
+        { appId: string; environment: string; settings: Omit<AppSettings, 'appId' | 'createdAt' | 'updatedAt'> }) => {
+      const res = await fetch(
+        `${config.apiBaseUrl}/admin/app-settings/${appId}?environment=${encodeURIComponent(environment)}`,
+        {
+          method: 'PUT',
+          headers: { ...authHeaders(), 'Content-Type': 'application/json' },
+          body: JSON.stringify(settings),
+        });
       if (!res.ok) throw new Error('Failed to update app settings');
       return res.json();
     },