pr_description.md

Feat: Add Stable Event Type IDs

This PR introduces a stable event_type_id to all contract events, addressing the need for reliable event identification across contract upgrades.

Changes

• Added event_type_id: u32 to all event structs in events.rs.
• Updated all publish_* functions to initialize the event_type_id.

Reasoning

By providing a stable identifier for each event, we can ensure that off-chain services can reliably track and process events, even if the event names or payload structures change in the future. This is a crucial step towards improving the long-term maintainability and interoperability of the contract.