refactor(FileManagerServicePath): Simplify URL builders and add agent family KB upload support

Summary

This MR refactors the FileManagerServicePath service by simplifying URL builder methods and adding support for specific agent family KB uploads.

Changes

Added

• New buildUploadSpecificAgentFamilyKBUrl(AgentFamily) method for uploading to specific agent family knowledge bases

Changed

• Simplified URL builder method signatures by removing unnecessary adminUid parameters:
  • buildUploadGeneralAgentFamiliesKBUrl()
  • buildGetMainN8NWorkflowTemplateForAgentFamilyUrl()
  • buildGetMainN8NWorkflowTemplateContentUrl()
• Renamed buildGetMainN8NWorkflowTemplateUrl() → buildGetMainN8NWorkflowTemplateForAgentFamilyUrl() for improved clarity

Removed

• Duplicate buildUploadAgentFamilyKBUrl() method