* log index validator - wip
* fix: Handle edge cases in LogIndexValidator and fix GitHub Actions
gix critical edge case: when first transaction has no logs, second transaction starting at logIndex=0 is VALID behavior
null handling
fix 'repo_token' parameter
* - Use Mono.empty() instead of Mono.just(null)
- Use defaultIfEmpty for handling empty results
* wip : add tests for LogIndexValidator
* test fixes
* fix: Fix ktlint issues in LogIndexValidatorTest
- Remove wildcard import
- Fix trailing spaces
- Add missing trailing commas
- Fix import order
- Add newline at end of file
* add disable option
* add logs for error case
* save prevState on doOnNext
* also check for first tx log index order
* add not continius indexes test
* make code thread safe
* use upstream.getHead
* search CHECK_TX_COUNT instead of 0 and 1 indexes
* refactor double rpc call
