added new di with connection pool and rebuild of the database/cache services

libs/connection-factory/src/index.ts

@@ -0,0 +1,23 @@
+export { ConnectionFactory } from './connection-factory';
+export { ServiceContainer, createServiceContainer } from './service-container';
+export { PoolSizeCalculator } from './pool-size-calculator';
+
+export type {
+  ConnectionPoolConfig,
+  MongoDBPoolConfig,
+  PostgreSQLPoolConfig,
+  CachePoolConfig,
+  ConnectionFactoryConfig,
+  ConnectionPool,
+  PoolMetrics,
+  ConnectionFactory as IConnectionFactory,
+} from './types';
+
+export type {
+  ServiceRegistration,
+  ServiceResolver,
+} from './service-container';
+
+export type {
+  PoolSizeRecommendation,
+} from './pool-size-calculator';