Release v21.1.0

Summary

Arc now preserves the host's dependency-injection validation settings and catches more reactor appends that bypass returned-event routing, without changing explicit non-default event-sequence behavior.

Changed

• Expand ARCCHR0003 to report reactors that append to the default event log through an injected IEventStore, including indirect member-access paths. (#2480)
• Preserve configured container factories and Development scope validation across the AddCratisArc host entry points while disabling only eager validation that Arc cannot support. (#2492)
• Update Chronicle dependencies to 16.20.0. (#2499)

Fixed

• Allow Arc.Core applications to start in Development without discarding the host's other service-provider settings. (#2492)
• Keep Cratis.Arc.ProxyGenerator.Build as a package build dependency without flowing its executable assembly into downstream compile and runtime graphs. (#2500)