API, Writer Service: Add directed stake target

[aoikurokawa]

API

• Add new fields to endpoints validators, jitosol_validators
  • jito_directed_stake_target
  • jito_directed_stake_lamports

Writer Service

• Dump data from the account DicrectedStakeMeta
  • jito_directed_stake_target
  • jito_directed_stake_lamports

https://github.com/jito-foundation/stakenet/blob/9e56c14b7384954be812f9495e41fe54fe5aa026/programs/steward/src/state/directed_stake.rs#L117

[Copilot]

Pull Request Overview

This PR adds support for Jito directed stake target tracking by introducing a new jito_directed_stake_target boolean field to validator data across the API, database, and writer service.

Key changes:

• Adds jito_directed_stake_target field to validator endpoints and database models
• Fetches directed stake metadata from the Steward program using the updated stakenet SDK
• Updates the writer service to accept and use a steward config pubkey parameter

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
api/src/schemas/validator.rs	Adds jito_directed_stake_target field to ValidatorEntry schema
api/src/resolvers/query_resolver.rs	Maps new field in validators and jitosol_validators query responses
core/src/db_models/validators.rs	Adds jito_directed_stake_target to Validator model and initialization
core/src/fetcher.rs	Fetches directed stake metadata and determines target validators, changes RPC client to Arc
writer-service/src/main.rs	Adds CLI argument for steward config pubkey
writer-service/src/lib.rs	Passes steward config to StakePoolManager
writer-service/src/stake_pool_manager.rs	Stores steward config and wraps RPC client in Arc
Cargo.toml	Updates stakenet dependencies to rev 6d35e58
Cargo.lock	Updates dependency lockfile with new stakenet revision
README.md	Updates example command with steward config parameter

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[ebatsell]

LGTM

we'll need to wait to deploy this unless we refactor the get_directed_stake_meta to keep making progress if the account is not found