glm-5.2
32dcc05658
First dedicated coverage pass (cargo-llvm-cov --workspace --all-features). Workspace at 87.1% line coverage (5759/6615), all 224 tests pass. Vault and registry layers are essentially fully covered; gaps concentrate in endpoint.rs (56%), types.rs (57%), and connection.rs (54%), all stemming from tests using MockConnection whose open_bi/accept_bi return Err. Eight suggestions (S1-S8) ordered by leverage: pure-function tests for dispatch_envelope / map_*_connection_error / error Display+Debug (S1-S3), Tier A directly-callable TLS/rustls helpers in endpoint.rs (S4), one loopback quinn integration test as the real unlock across four files (S5), ACME event-loop extraction via synthetic stream (S6, the flagged research item), and two small remaining gaps (S7-S8). No critical or warning findings — this is a testing-infrastructure gap, not a logic gap.