refactor(scripts): remove timestamp generation from schema files

Remove timestamp generation in schema generator to avoid unnecessary
file changes on each build. Timestamps in generated files create
noise in version control without providing meaningful value.

Author: Mearman

scripts/generate-schemas.js

@@ -232,7 +232,6 @@ function generateAJVValidators(schemas) {
 
   const validatorCode = `/**
  * Auto-generated AJV validators for markmv API methods
- * Generated on: ${new Date().toISOString()}
  * 
  * DO NOT EDIT MANUALLY - This file is auto-generated
  */
@@ -309,7 +308,6 @@ function generateMCPTools(schemas) {
 
   const mcpCode = `/**
  * Auto-generated MCP tool definitions for markmv API methods
- * Generated on: ${new Date().toISOString()}
  * 
  * DO NOT EDIT MANUALLY - This file is auto-generated
  */
@@ -355,7 +353,6 @@ function generateAPIRoutes(schemas) {
 
   const apiCode = `/**
  * Auto-generated REST API route definitions for markmv API methods
- * Generated on: ${new Date().toISOString()}
  * 
  * DO NOT EDIT MANUALLY - This file is auto-generated
  */