chore(chain): migrate to sentrix-proto crate (drop local proto/build.rs)

[satyakwok]

What

Drops the vendored crates/chain/proto/sentrix.proto + local build.rs codegen. Imports the canonical schema from the sentrix-proto crate (v0.1.1) instead — same crate that sdk-rs + grpc-wasm already use.

Why

Single source of truth. Schema bumps now flow via cargo update -p sentrix-proto instead of a manual sync from sentrix-labs/sentrix per consumer repo.

Diff shape

• Cargo.toml: drop tonic-prost, prost, all 3 build-deps; add sentrix-proto = "0.1.1"
• src/lib.rs: replace tonic::include_proto!("sentrix.v1") with pub use sentrix_proto as pb
• delete crates/chain/proto/sentrix.proto and build.rs
• .gitignore: skip local compose.env + docker-compose.override.yml

Existing crate::pb::Foo call sites (in grpc.rs, sync/tail.rs) keep working — pub use re-export preserves the same pb::sentrix_client::SentrixClient, pb::GetBlockRequest, etc.

Verify

cargo build -p indexer-chain --release  # 5m 06s, exit 0

Follow-up

• None for this PR. Future schema additions: bump sentrix-proto on crates.io, then cargo update -p sentrix-proto here.

Summary by CodeRabbit

• Chores
  • Consolidated gRPC/Protobuf schema dependencies to use a single external source for improved consistency and maintainability.
  • Updated gitignore to exclude local environment configuration files.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 13941964-88b3-46f7-b1df-e1ed30039e1a

📥 Commits

Reviewing files that changed from the base of the PR and between 528fc94 and 9ded98e.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock, !**/*.lock

📒 Files selected for processing (5)

• .gitignore
• crates/chain/Cargo.toml
• crates/chain/build.rs
• crates/chain/proto/sentrix.proto
• crates/chain/src/lib.rs

💤 Files with no reviewable changes (2)

• crates/chain/proto/sentrix.proto
• crates/chain/build.rs

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📝 Walkthrough

Walkthrough

The changes migrate the gRPC/protobuf schema infrastructure from local code generation to an external dependency. The crates/chain/build.rs build script and crates/chain/proto/sentrix.proto proto definition file are removed. The Cargo.toml is updated to depend on sentrix-proto = "0.1.1" instead of invoking local codegen. The library's public API re-exports protobuf types directly from sentrix-proto rather than including them locally via tonic::include_proto!. Environment files are added to .gitignore.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description provides clear context (What/Why/Diff shape/Verify), but does not follow the repository's required template structure with Scope and Checks sections.	Add missing template sections: Scope (contract/test/deploy/tooling), Checks (build/test/fmt/slither), Linked issue, and Deploy impact checkboxes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: migrating from local protobuf files to the sentrix-proto crate while removing build.rs.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/migrate-to-sentrix-proto-crate

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