fix(account-sdk): validate telemetry preference before init

[omerbek]

Summary

• reject defined non-boolean telemetry preferences even when the value is falsy
• validate preferences before one-time telemetry initialization can act on invalid input
• add regression coverage for telemetry: 0

Fixes #383.

Testing

• corepack yarn workspace @base-org/account exec vitest run src/util/validatePreferences.test.ts src/interface/builder/core/createBaseAccountSDK.test.ts
• corepack yarn biome check packages/account-sdk/src/util/validatePreferences.ts packages/account-sdk/src/util/validatePreferences.test.ts packages/account-sdk/src/interface/builder/core/createBaseAccountSDK.ts
• git diff --check

Note: corepack yarn workspace @base-org/account typecheck still fails on this checkout with the existing generated asset error: src/ui/Dialog/Dialog.tsx(10,17): Cannot find module './Dialog-css.js'.

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/2	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2