Breaking change: modelRegistry.getApiKey renamed in pi SDK ≥0.63

[rfgamaral]

ctx.modelRegistry.getApiKey() was renamed to getApiKeyAndHeaders() in pi SDK 0.63+. pi-reflect calls the old method in two places:

• extensions/index.ts:110
• extensions/reflect.ts:1044

This causes a runtime error when running /reflect:

Extension "command:reflect" error: ctx.modelRegistry.getApiKey is not a function

Versions:

• pi SDK: 0.63.2
• pi-reflect: 1.1.0 (latest main, commit 2213624)