Feature/sc 005

[Drock0]

[SC-005] Persist Slot Ownership Mapping

Description

This PR resolves issue #5 by implementing and verifying the persistence of the slot ownership mapping in the ChronoPayContract.

Closes #5

Changes Introduced

• Added SlotOwner(u32) to the DataKey enum for persistent state mapping.
• Added a new Error enum to cleanly handle fallback logic for missing lookups (SlotNotFound = 1).
• Modified create_time_slot to save the mapped relationship between the newly created slot_id and the professional's proxy String reference into env.storage().persistent().
• Implemented get_slot_owner, exposing a look-up pattern that accurately fetches the mapped string, raising a clear Host error (SlotNotFound) if uninitialized.

Security Notes & Acceptance Criteria

• Storage space usage is properly sequestered within standard contract state mapping.
• No unexpected mutation logic spans outward to external modules.
• The default failure mode of reading an invalid slot defaults closed via returning a robust result encapsulation wrapped in an Error enum.
• Fully compatible with current auth stub implementations using proxies.

Testing Output

running 5 tests
test test::test_hello ... ok
test test::test_get_slot_owner_not_found - should panic ... ok
test test::test_get_slot_owner ... ok
test test::test_mint_and_redeem ... ok
test test::test_create_time_slot_auto_increments ... ok

test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s

[drips-wave]

@Drock0 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

[Drock0]

@thlpkee20-wq please merge

[Drock0]

@thlpkee20-wq