chore: update sdk status in readme

[shikhar]

No description provided.

[greptile-apps]

Greptile Summary

This PR updates the SDK compatibility section in the README.md to reflect the current migration status. The Python SDK entry is updated from "needs to be migrated to v1 API" to "being migrated to v1 API" (indicating migration is now actively in progress), and the Java SDK entry is removed entirely from the list.

• Python SDK status updated from pending ("needs to be migrated") to active ("being migrated to v1 API")
• Java SDK entry removed from the compatibility list

Confidence Score: 5/5

• Documentation-only change with no code impact; safe to merge.
• This is a two-line README edit updating SDK statuses. There is no logic, code, or configuration affected. The changes accurately reflect what the diff shows: Python migration is underway and the Java SDK has been removed from the list.
• No files require special attention

Important Files Changed

Filename	Overview
README.md	Minor documentation update — Python SDK status updated to reflect active migration, Java SDK entry removed entirely

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    S2[S2 v1 API] --> CLI["CLI ✅ v0.26+"]
    S2 --> TS["TypeScript SDK ✅ v0.22+"]
    S2 --> Go["Go SDK ✅ v0.11+"]
    S2 --> Rust["Rust SDK ✅ v0.22+"]
    S2 --> Python["Python SDK 🚧 being migrated to v1 API"]

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_{Reviews (1): Last reviewed commit: "rm java sdk ref, update py status" | Re-trigger Greptile}