Add N8n integration with models, services, and routes

- Introduced N8n and N8nSetting models in both MySQL and PostgreSQL schemas.
- Implemented N8nController and N8nService for managing N8n bots.
- Created N8nRouter for handling API requests related to N8n.
- Added DTOs and validation schemas for N8n integration.
- Updated server module and chatbot controller to include N8n functionality.
- Configured environment settings for N8n integration.

prisma/mysql-schema.prisma

@@ -106,6 +106,7 @@ model Instance {
   Flowise                 Flowise[]
   FlowiseSetting          FlowiseSetting?
   Pusher                  Pusher?
+  N8n                     N8n[]
 }
 
 model Session {
@@ -643,3 +644,52 @@ model IsOnWhatsapp {
   createdAt  DateTime @default(dbgenerated("CURRENT_TIMESTAMP")) @db.Timestamp
   updatedAt  DateTime @updatedAt @db.Timestamp
 }
+
+model N8n {
+  id              String           @id @default(cuid())
+  enabled         Boolean          @default(true) @db.Boolean
+  description     String?          @db.VarChar(255)
+  webhookUrl      String?          @db.VarChar(255)
+  basicAuthUser   String?          @db.VarChar(255)
+  basicAuthPass   String?          @db.VarChar(255)
+  expire          Int?             @default(0) @db.Integer
+  keywordFinish   String?          @db.VarChar(100)
+  delayMessage    Int?             @db.Integer
+  unknownMessage  String?          @db.VarChar(100)
+  listeningFromMe Boolean?         @default(false) @db.Boolean
+  stopBotFromMe   Boolean?         @default(false) @db.Boolean
+  keepOpen        Boolean?         @default(false) @db.Boolean
+  debounceTime    Int?             @db.Integer
+  ignoreJids      Json?
+  splitMessages   Boolean?         @default(false) @db.Boolean
+  timePerChar     Int?             @default(50) @db.Integer
+  triggerType     TriggerType?
+  triggerOperator TriggerOperator?
+  triggerValue    String?
+  createdAt       DateTime?        @default(now()) @db.Timestamp
+  updatedAt       DateTime         @updatedAt @db.Timestamp
+  Instance        Instance         @relation(fields: [instanceId], references: [id], onDelete: Cascade)
+  instanceId      String
+  N8nSetting      N8nSetting[]
+}
+
+model N8nSetting {
+  id              String    @id @default(cuid())
+  expire          Int?      @default(0) @db.Integer
+  keywordFinish   String?   @db.VarChar(100)
+  delayMessage    Int?      @db.Integer
+  unknownMessage  String?   @db.VarChar(100)
+  listeningFromMe Boolean?  @default(false) @db.Boolean
+  stopBotFromMe   Boolean?  @default(false) @db.Boolean
+  keepOpen        Boolean?  @default(false) @db.Boolean
+  debounceTime    Int?      @db.Integer
+  ignoreJids      Json?
+  splitMessages   Boolean?  @default(false) @db.Boolean
+  timePerChar     Int?      @default(50) @db.Integer
+  createdAt       DateTime? @default(now()) @db.Timestamp
+  updatedAt       DateTime  @updatedAt @db.Timestamp
+  Fallback        N8n?      @relation(fields: [n8nIdFallback], references: [id])
+  n8nIdFallback   String?   @db.VarChar(100)
+  Instance        Instance  @relation(fields: [instanceId], references: [id], onDelete: Cascade)
+  instanceId      String    @unique
+}