v0.175.0

What's Changed

• Centralize ConnectError handling in grackleError.ts (#1459) by @nick-pape in #1564
• Scope tunnel registry into instance class by @nick-pape in #1561
• Extract shared gRPC request validation helpers (#1455) by @nick-pape in #1565
• Add @grackle-ai/test-utils with type-safe mock infrastructure (#1548) by @nick-pape in #1560

Full Changelog: v0.174.0...v0.175.0