Publish the OkHttp interceptor module (sdk-okhttp) to Maven Central alongside android-sdk 3.0.0

[fungc-io]

Summary

Since 3.0.0, the base SDK is published to Maven Central as com.authgear:android-sdk:3.0.0, but the OkHttp interceptor module (sdk-okhttp) is not published there. There's currently no Maven Central coordinate a developer can add to get AuthgearInterceptor alongside the Maven Central base SDK.

Evidence

Base SDK is on Maven Central; the interceptor is not:

com.authgear:android-sdk               -> HTTP 200   (repo1.maven.org)
com.authgear:android-sdk-okhttp        -> HTTP 404
com.authgear:authgear-sdk-android-okhttp -> HTTP 404

In the source at tag 3.0.0:

• sdk/build.gradle.kts uses the Vanniktech plugin with publishToMavenCentral() and coordinates("com.authgear", "android-sdk", …) → publishes to Central. ✅
• sdk-okhttp/build.gradle.kts uses only id("maven-publish") with artifactId = "authgear-sdk-android-okhttp" (no publishToMavenCentral() / Vanniktech config) → not published to Maven Central.

So the interceptor (com.oursky.authgear.okhttp.AuthgearInterceptor) has no Central release to pair with android-sdk:3.0.0.

Impact

• The docs page OkHttp interceptor extension can't give a working Maven Central dependency line. (I updated the main Android SDK page to Maven Central in Android SDK docs: Maven Central 3.0.0, AppCompat note, and tutorial fixes docs#47, but intentionally left the OkHttp page alone because there's no coordinate to document yet.)
• Developers who follow the (now Maven Central) base SDK setup and then want the OkHttp interceptor have no clean, consistent way to add it.

Suggested fix

Publish sdk-okhttp to Maven Central with the same tooling/versioning as the base module — e.g. com.authgear:android-sdk-okhttp:3.0.0 (Vanniktech publishToMavenCentral() + matching coordinates(...) and version), so the two artifacts stay in lockstep. Then the docs page can document the dependency.

Related (minor, separate)

The OkHttp doc's code sample mixes Java/Kotlin syntax (new OkHttpClient.Builder()....addInterceptor(AuthgearInterceptor(authgear))) and reads as incomplete — worth a small docs cleanup once the coordinate exists.

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Context: found while modernizing the authgear-example-android sample (PR #5) and reconciling the Android docs.

[linear]

DEV-3727