v0.6.1 — Validation patch

Fixes

• CLI --compact now works after the subcommand: sahmk quote 2222 --compact
• Non-JSON 200 responses (e.g. proxy errors) wrapped in SahmkError instead of raw ValueError
• on_reconnect docstring corrected — fires before reconnect attempt, not after
• quotes([]) guard — empty list raises ValueError immediately
• Redundant 429 removed from _RETRIABLE_STATUS_CODES
• Test fixtures aligned with real API response shapes

Changed

• PyPI classifier upgraded to "4 - Beta"

Full changelog: CHANGELOG.md