fix: validate telemetry preference before initialization

[omerbek]

Fixes #383.

Summary

• validates any defined preference.telemetry value by type instead of using a truthiness check
• moves preference validation before store writes and telemetry initialization
• adds regression coverage for falsy non-boolean telemetry values and initialization ordering

Why

telemetry: 0 previously skipped validatePreferences() because 0 is falsy. The telemetry initialization check uses strict comparison (telemetry !== false), so the same value was treated as enabled. Validation also ran after telemetry initialization, which meant invalid preference values could be used before they were rejected.

This keeps the documented values (true, false, or omitted) working as before while rejecting invalid types before side effects.

Note

I saw #303 also touches configuration validation order. This PR keeps the scope narrow to the telemetry preference type check and the side-effect ordering needed for that validation to be effective.

Testing

• corepack yarn workspace @base-org/account node compile-assets.cjs
• corepack yarn workspace @base-org/account test src/util/validatePreferences.test.ts src/interface/builder/core/createBaseAccountSDK.test.ts --run
• corepack yarn workspace @base-org/account typecheck
• 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 packages/account-sdk/src/interface/builder/core/createBaseAccountSDK.test.ts

[cb-heimdall]

🟡 Heimdall Review Status

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[omerbek]

Closing this duplicate in favor of #385, which carries the same fix with the current branch and testing notes.