fix: CLI duplicate param dedup + positional arg ordering

- Deduplicate registry params in CLI builder (expiration appeared twice)
- Handle required-after-optional positional args (clap constraint)
- Add try_arg() for optional param fallback
- Option history_ohlc/quote: interval falls back to start_time position
- Include live endpoint test results (37/45 pass, 8 subscription limits)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: userFRM