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]>

packages/contracts/package.json

@@ -27,20 +27,11 @@
     "spdx-expression-parse": "5.0.0",
     "zod": "4.4.3"
   },
-  "peerDependencies": {
-    "drizzle-orm": ">=0.45.2 <0.46.0"
-  },
-  "peerDependenciesMeta": {
-    "drizzle-orm": {
-      "optional": true
-    }
-  },
   "devDependencies": {
     "@biomejs/biome": "2.5.3",
     "@types/node": "24.13.3",
     "@types/semver": "7.7.1",
     "@types/spdx-expression-parse": "4.0.0",
-    "drizzle-orm": "0.45.2",
     "typescript": "7.0.2",
     "vitest": "4.1.10"
   },