[CHORE]: Standardize Active-State Field Names and Add UUID Support for Prompts & Resources

[rakdutta]

There are currently inconsistencies in how active-state fields are represented across different components of the system:

• Resources / Prompts/Servers : is_active or isActive
• **Gateways / tools/a2a_agents: ** enabled

Proposed Solution:

1. Standardize active-state field naming

   • Decide on a single naming convention (eg.enabled`)

   • Apply this convention across:

     • Resources
     • Prompts
     • Tools
     • Gateways
     • Servers
     • a2a_agents

2. Introduce UUID support

   • Add UUID identifiers for prompts and resources
   • Ensure consistency with existing entities and database structure