[chrischeng-c4]

Closes #42

Changes

• Implemented pub async fn status(&self) -> RaftStatus on RaftHost in crates/raft-runtime/src/application/host/membership_ops.rs with doc comments noting it returns the point-in-time snapshot matching /raftz.
• Relocated host_status(&Shared) -> RaftStatus next to RaftStatus in crates/raft-runtime/src/application/host/status.rs and re-exported it in crates/raft-runtime/src/interfaces/peer_http/status.rs, preserving the exact JSON shape and avoiding duplicate field mappings.
• Registered and implemented integration tests in crates/raft-runtime/tests/it/host_status.rs (registered in tests/it/main.rs) covering leader, follower, and learner roles, verifying equivalence with /raftz over h2c.

Local Test Evidence

• Compilation: cargo check -p raft-runtime --all-targets succeeded with 0 errors.
• Formatting / Clippy: formatting verified with rustfmt --edition 2024; cargo clippy passed cleanly for all changed files.
• Affected local unit tests: cargo test -p raft-runtime --test it -- raft_status_json_is_pinned passed (1 passed; 0 failed).

Cloud MR Validation (PENDING / NOT RUN)

Per the user's test policy, tests that launch clusters, Raft nodes, perform elections, or use HTTP/network interactions run exclusively in cloud CI:

• host_status integration test suite (tests/it/host_status.rs): NOT RUN locally; PENDING cloud CI execution on the opened PR.
• Full crate test suite (cargo test -p raft-runtime): PENDING cloud CI verification.

[chrischeng-c4]

Summary of Repair for Issue #42

Diff Classification & Changes

• Diff classification: Test fix for host_status::learner_status in crates/raft-runtime/tests/it/host_status.rs.
• Root cause: In learner_status, the test configured a 3-node cluster and called demote_voter, which failed in CI with DemotionRefused::ToleranceWouldDrop { before: 1, after: 0 } because reducing a 3-voter cluster to 2 voters drops fault tolerance from 1 to 0.
• Fix: Updated learner_status to use a 4-voter cluster (cluster(4)), matching membership_changes.rs where voter demotion retains fault tolerance of 1.

Local Validation Evidence

• Compilation: cargo check -p raft-runtime --all-targets passed cleanly (0 errors).
• Formatting: rustfmt --edition 2024 --check crates/raft-runtime/tests/it/host_status.rs passed cleanly.
• Affected isolated unit test: cargo test -p raft-runtime --test it -- wire_golden::raft_status_json_is_pinned passed (1 passed, 0 failed).

Cloud MR Validation (PENDING / NOT RUN)

Per the user's test policy, tests that launch clusters, Raft nodes, perform elections, or use HTTP/network interactions run exclusively in cloud CI:

• host_status integration test suite (tests/it/host_status.rs): NOT RUN locally; PENDING cloud CI execution on PR raft-runtime: public RaftHost::status() accessor #69.
• Full crate test suite (cargo test -p raft-runtime): PENDING cloud CI verification on PR raft-runtime: public RaftHost::status() accessor #69.