Port to Bevy 0.17 + fix hot reload schedule registration

[CharlieBaker2002]

Summary

• Update all Bevy dependencies to 0.17.3
• Fix InternedScheduleLabel interning across library swaps using string-based comparison
• Add ActiveReloadableSchedules resource for dynamic label lookup
• Add RegisteredScheduleRunners to prevent duplicate runner registration
• Suppress kqueue file watcher panic on macOS (FSEvent backend still works)
• Add DEXTEROUS_MANUAL_RELOAD env var for manual-only reload mode
• Switch notify crate to macos_fsevent feature

Details

The main issue with Bevy 0.17 was that InternedScheduleLabel values are pointer-based and don't survive library swaps during hot reload. This PR fixes it by:

1. Using string-based hash/equality in WrappedSchedule for stable comparison across reloads
2. Storing active schedule labels in a resource that gets updated on each reload
3. Having schedule runners look up labels dynamically instead of capturing them

Test plan

• Tested hot reload with multiple consecutive reloads (VERSION_A → B → C → ...)
• Verified systems continue running after reload
• Confirmed no kqueue panic messages with suppression hook
• Tested manual reload mode with DEXTEROUS_MANUAL_RELOAD=1
• Tested with bevy/dynamic_linking for faster reload times (~5s vs ~15s)

🤖 Generated with Claude Code