fix: keep Drizzle out of every published declaration (ADR 0053)

@ekklesia/contracts still emitted a type-only import of
drizzle-orm/node-postgres for the legacy ModuleDatabase facade, so a
standalone module type-checked only because skipLibCheck hid it.

- ModuleDatabase, LegacyModuleRuntimeServices and
  AnyModuleRuntimeServices move to core/src/modules/database.ts, beside
  the facade Core builds; the facade itself is unchanged.
- contracts' runtime, route, and services generics no longer name an
  ORM: the database type is a plain parameter defaulting to the ABI v1
  executor, and the legacy definition's database is opaque until Core
  specializes it. Core and apps/api name the legacy types from Core.
- contracts drops its drizzle-orm optional peer and devDependency;
  Drizzle stays public only through @ekklesia/module-database/drizzle.
- The facade's type-level test moves from contracts to Core.
- Regression proof: the standalone fixture type-checks with
  skipLibCheck: false against the packed tarballs, with no drizzle-orm
  installed (the smoke asserts both). Against the previous contracts
  tarball the same check fails with TS2307 on drizzle-orm/node-postgres.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/api/tests/app.test.ts

@@ -1,8 +1,6 @@
 import {
   ANONYMOUS_PRINCIPAL,
   createAuthenticatedPrincipal,
-  type ModuleDatabase,
-  type ModuleRuntimeServices,
   moduleIdSchema,
   parseEkklesiaUserId,
   parsePermissionId,
@@ -20,6 +18,8 @@ import { IdentityRuntimeError } from "@ekklesia/core/identity";
 import {
   createModuleUiPublicationRegistry,
   EMPTY_MODULE_REALTIME_REGISTRY,
+  type LegacyModuleRuntimeServices,
+  type ModuleDatabase,
   type ModuleUiPublicationRegistry,
   StagedModuleRealtimeRegistry,
 } from "@ekklesia/core/modules";
@@ -48,9 +48,9 @@ function fakeRuntime(overrides: Partial<EkklesiaIdentityRuntime> = {}): Ekklesia
   };
 }
 
-/** A small typed fake `ModuleRuntimeServices` — these tests exercise `createApiApp`'s own wiring,
+/** A small typed fake `LegacyModuleRuntimeServices` — these tests exercise `createApiApp`'s own wiring,
  * never real database behavior, so no PostgreSQL is required. */
-function fakeModuleServices(): ModuleRuntimeServices {
+function fakeModuleServices(): LegacyModuleRuntimeServices {
   const database = Object.freeze({
     delete: vi.fn(),
     execute: vi.fn(),