- Added validation so OpenAI-style usage parsing only accepts object payloads with token fields.
- Prevented streaming usage:null chunks from publishing zero-token records before the final usage chunk arrives.
- Reused the shared OpenAI-style parser for stream usage to support both chat completions and responses token field names.
- Added tests covering null usage chunks and input/output token usage fields in streaming responses.
- Introduced methods for setting and retrieving model aliases in execution and usage contexts.
- Enhanced `UsageReporter` and related structures to include client-requested aliases.
- Updated tests to validate alias propagation and ensure correct usage reporting.
- Adjusted metadata handling in CLIProxyAPI executors to address alias integration.
- Added `buildAdditionalModelRecord` to filter out zero-token usage details.
- Introduced `hasNonZeroTokenUsage` helper function for token usage validation.
- Updated tests to cover scenarios for zero and non-zero token usage.
mochenya