chore: rename owner info to rvto2addr

[runcom]

Builds from #111 which is needed first, this is open for discussion

[gemini-code-assist]

Summary of Changes

Hello @runcom, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on a significant renaming effort, transitioning the OwnerInfo entity and its associated components to RVTO2Addr. This change is accompanied by a refactoring of API handlers and database interaction logic to enhance error handling and clarify the purpose of the related data structures. The update also introduces more specific error types and expands test coverage to validate these improvements.

Highlights

• Renaming OwnerInfo to RVTO2Addr: The OwnerInfo concept, including its corresponding database model, API handler, and related functions, has been systematically renamed to RVTO2Addr to better reflect its purpose.
• API Handler Refactoring: The RvInfoHandler and the newly introduced RVTO2AddrHandler have been refactored to remove explicit sync.Mutex usage, indicating a shift in concurrency management or that it's handled at a higher level. Logging for error conditions has been upgraded from slog.Debug to slog.Error.
• Improved Database Error Handling: Database functions for RVTO2Addr and RvInfo now incorporate more robust error handling, specifically for duplicate key conflicts (gorm.ErrDuplicatedKey) during creation and record not found (gorm.ErrRecordNotFound) during updates, utilizing gorm.io/gorm/clause for OnConflict resolution.
• New Sentinel Errors: Two new sentinel errors, ErrInvalidRVTO2Addr and ErrInvalidRvInfo, have been introduced in the internal/db package to provide more specific error classification for invalid data payloads.
• Expanded Test Coverage: New test files (rvinfo_test.go, rvto2addr_test.go, db_owner_rvinfo_errors_test.go) have been added to ensure the correct behavior of the refactored API handlers and the new database error handling.

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[gemini-code-assist]

Code Review

This pull request refactors owner info to rvto2addr, which is a great clarification. Beyond the renaming, this PR introduces significant improvements to the handlers and database interactions. The previous implementation had race conditions in create/update operations which are now resolved by using atomic database operations (ON CONFLICT). Error handling is also improved with the introduction of sentinel errors and more specific error checks in the handlers. The addition of comprehensive tests for the new and modified handlers is also a valuable contribution. I have a couple of suggestions for further improving consistency.

[gemini-code-assist]

The function name setupTestDBForOwnerRv is a bit long and specific. Since this seems to be a general-purpose test database setup function, consider renaming it to setupTestDB for brevity and to follow the convention seen in other test files in this repository (e.g., in api/handlersTest).

If this helper is intended to be used across multiple test files in this package, you could also consider moving it to a test_helper.go file.

Suggested change

	func setupTestDBForOwnerRv(t *testing.T) {
	func setupTestDB(t *testing.T) {