fix(orm): add explicit types for all ConversationORM and MessageORM fields

Complete fix for all @Column decorators missing explicit type:

## ConversationORM
- status: varchar(20)
- category: varchar(50)
- messageCount: int
- userMessageCount: int
- assistantMessageCount: int
- totalInputTokens: int
- totalOutputTokens: int
- hasConverted: boolean
- consultingStage: varchar(30)
- conversionPath: varchar(30)

## MessageORM
- role: varchar(20)
- type: varchar(30)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/services/conversation-service/src/infrastructure/database/postgres/entities/conversation.orm.ts

@@ -25,7 +25,7 @@ export class ConversationORM {
   @Column({ name: 'user_id', type: 'uuid', nullable: true })
   userId: string;
 
-  @Column({ length: 20, default: 'ACTIVE' })
+  @Column({ type: 'varchar', length: 20, default: 'ACTIVE' })
   status: ConversationStatusType;
 
   @Column({ type: 'varchar', length: 255, nullable: true })
@@ -34,22 +34,22 @@ export class ConversationORM {
   @Column({ type: 'text', nullable: true })
   summary: string | null;
 
-  @Column({ length: 50, nullable: true })
+  @Column({ type: 'varchar', length: 50, nullable: true })
   category: string | null;
 
-  @Column({ name: 'message_count', default: 0 })
+  @Column({ name: 'message_count', type: 'int', default: 0 })
   messageCount: number;
 
-  @Column({ name: 'user_message_count', default: 0 })
+  @Column({ name: 'user_message_count', type: 'int', default: 0 })
   userMessageCount: number;
 
-  @Column({ name: 'assistant_message_count', default: 0 })
+  @Column({ name: 'assistant_message_count', type: 'int', default: 0 })
   assistantMessageCount: number;
 
-  @Column({ name: 'total_input_tokens', default: 0 })
+  @Column({ name: 'total_input_tokens', type: 'int', default: 0 })
   totalInputTokens: number;
 
-  @Column({ name: 'total_output_tokens', default: 0 })
+  @Column({ name: 'total_output_tokens', type: 'int', default: 0 })
   totalOutputTokens: number;
 
   @Column({ type: 'smallint', nullable: true })
@@ -58,11 +58,12 @@ export class ConversationORM {
   @Column({ type: 'text', nullable: true })
   feedback: string | null;
 
-  @Column({ name: 'has_converted', default: false })
+  @Column({ name: 'has_converted', type: 'boolean', default: false })
   hasConverted: boolean;
 
   @Column({
     name: 'consulting_stage',
+    type: 'varchar',
     length: 30,
     default: 'greeting',
     nullable: true,
@@ -93,6 +94,7 @@ export class ConversationORM {
 
   @Column({
     name: 'conversion_path',
+    type: 'varchar',
     length: 30,
     nullable: true,
   })

packages/services/conversation-service/src/infrastructure/database/postgres/entities/message.orm.ts

@@ -24,10 +24,10 @@ export class MessageORM {
   @Column({ name: 'conversation_id', type: 'uuid', nullable: true })
   conversationId: string;
 
-  @Column({ length: 20 })
+  @Column({ type: 'varchar', length: 20 })
   role: MessageRoleType;
 
-  @Column({ length: 30, default: 'TEXT' })
+  @Column({ type: 'varchar', length: 30, default: 'TEXT' })
   type: MessageTypeType;
 
   @Column({ type: 'text' })