v0.5.2 🌈

Changes

• fix: Track fire-and-forget flush tasks in CommandCoalescer @kclif9 (#65)
• refactor: Make command builders private across all models @kclif9 (#64)
• chore: Remove empty models/base.py placeholder module @kclif9 (#63)
• feat: Parse ModeSupport from API to determine supported HVAC modes @kclif9 (#61)
• feat: Add zone capability fields (VAV, ITC, ITD, IHD, IAC) @kclif9 (#62)
• fix: tighten library types to eliminate unnecessary Optional @kclif9 (#60)
• fix: eliminate race conditions in token mutations and OAuth handler replacement @kclif9 (#59)
• fix: add truthy guard for master_serial in system.py @kclif9 (#58)
• fix: use time.monotonic() for token validity checks @kclif9 (#57)
• fix: graceful degradation for nested status component parsing @kclif9 (#56)
• fix: add optimistic state update to ACSystem.set_system_mode @kclif9 (#47)
• fix: Comprehensive code quality improvements @kclif9 (#46)
• refactor: replace hardcoded AC mode strings with constants @kclif9 (#45)
• fix: make zone and status temp limits mode-aware (heat vs cool) @kclif9 (#44)