release(v4.10.0): cross-host approval routing primitives in @shade/sdk

Builds on V4.9's encrypted profile blob: ships the canonical
profile-blob schema (hosts/clients/trustedApproverFingerprints) and
the build/sign/verify trio for proxy-approval frames. Headless servers
can now route a `linkRequest` to a trusted-approver phone, verify the
phone's Ed25519 signature against the fresh profile blob, and complete
pairing without a GUI host being available.

Length-prefixed binary signing payload so any platform (Kotlin, Swift,
Go) can produce byte-identical signing input from test vectors. No
relay or transport changes — entirely SDK-level.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/shade-key-transparency/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@shade/key-transparency",
-  "version": "4.9.0",
+  "version": "4.10.0",
   "type": "module",
   "main": "src/index.ts",
   "types": "src/index.ts",