feat(database): add pgbouncer support and optimize postgres config

- Add pgbouncer service to handle connection pooling
- Update database connection URIs to support direct and pooled connections
- Optimize postgres configuration with better memory settings
- Update prisma schema to support directUrl connection

prisma/postgresql-schema.prisma

@@ -9,8 +9,9 @@ generator client {
 }
 
 datasource db {
-  provider = "postgresql"
-  url      = env("DATABASE_CONNECTION_URI")
+  provider  = "postgresql"
+  url       = env("DATABASE_CONNECTION_URI")
+  directUrl = env("DATABASE_DIRECT_CONNECTION_URI")
 }
 
 enum InstanceConnectionStatus {
@@ -376,8 +377,8 @@ model TypebotSetting {
   debounceTime      Int?      @db.Integer
   typebotIdFallback String?   @db.VarChar(100)
   ignoreJids        Json?
-  splitMessages     Boolean?         @default(false) @db.Boolean
-  timePerChar       Int?             @default(50) @db.Integer
+  splitMessages     Boolean?  @default(false) @db.Boolean
+  timePerChar       Int?      @default(50) @db.Integer
   createdAt         DateTime? @default(now()) @db.Timestamp
   updatedAt         DateTime  @updatedAt @db.Timestamp
   Fallback          Typebot?  @relation(fields: [typebotIdFallback], references: [id])
@@ -748,4 +749,4 @@ model EvoaiSetting {
   evoaiIdFallback String?   @db.VarChar(100)
   Instance        Instance  @relation(fields: [instanceId], references: [id], onDelete: Cascade)
   instanceId      String    @unique
-}
+}