feat: add personalization API (run/runAll) to Android SDK

[devin-ai-integration]

Summary

Adds run() and runAll() to the existing ReelevantSDK class so the same SDK instance handles both analytics tracking and personalization — with shared identity.

Key design: Identity auto-resolves from setUser() → stored tmpId → fallback, so callers don't pass userId manually (but can override via RunOptions.userId).

New API surface

// Constructor gains optional personalization config (backward compatible)
ReelevantSDK(context, companyId, datasourceId,
    runnerUrl = "https://reelevant.run",    // default
    personalizationTimeout = 5000L,          // default
    fallback = FallbackStrategy.Empty        // default
)

suspend fun run(options: RunOptions): RunResult
suspend fun runAll(optionsList: List<RunOptions>): List<RunResult>

RunResult.body is a sealed class RunContent with variants Json(JSONObject), Html(String), Image(ByteArray), Empty.

Files

• New: personalization.kt — types (RunOptions, RunResult, RunContent, FallbackStrategy, error classes) + internal runner HTTP logic (executeRunnerCall, fireAndForgetClick)
• Modified: sdk.kt — added run()/runAll()/resolveUserId()/handleRunError() methods + new constructor params with defaults
• Updated: README.md — full personalization docs with usage examples

Link to Devin session: https://app.devin.ai/sessions/cb78c8f2e2ba4d348b6f9a8c274c69bb
Requested by: @vmarchaud

[devin-ai-integration]

Original prompt from vmarchaud

i want to provide the same DX as the web sdk but for mobile SDKs, check mobile personalization part in the docs to understand better

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment, CI, and merge conflict monitoring

[devin-ai-integration]

Devin Review found 3 potential issues.