Runtime log-level control

Test cases for runtime per-context log-level control (Runtime per-context log-lev... (FEAT_0075)) — applying DLT control messages and the production INFO default.

Test Case: Set-Log-Level and Set-Default control messages apply TEST_0810
status: implemented
verifies: REQ_0810
links incoming: REQ_0810

Goal. Confirm that DLT control messages from the daemon (Set-Log-Level for one Context ID; Set-Default-Log-Level for the global default) update the per-context atomic level table and are observable via LevelTable::current.

Fixture. crates/taktora-log-dlt/tests/control.rs:7-35. The flusher’s receive-half wiring lives in src/flusher.rs and is exercised indirectly via the apply path; parser unit tests live in crates/taktora-log-dlt/src/control.rs.

Steps.

  1. ControlMessage::SetLogLevel { ctx: CtxId("MAIN"), level: Debug }.apply(&table).

  2. ControlMessage::SetDefaultLogLevel(Warn).apply(&table).

Expected outcome. After (1), table.current(CtxId("MAIN")) reads Debug. After (2), table.current(CtxId("NEW1")) (a context never written to explicitly) reads Warn.
Test Case: Default level is INFO until overridden TEST_0811
status: implemented
verifies: REQ_0811
links incoming: REQ_0811

Goal. Confirm that LevelTable::new(Level::Info) (the production default selected by Builder::with_max_level) resolves to Info for any Context ID before any runtime override, so production builds never default to Debug.

Fixture. crates/taktora-log-dlt/tests/level_table.rs:4-9.

Steps.

  1. let table = LevelTable::new(log::Level::Info);

  2. table.current(&CtxId::new("MAIN").unwrap()).

Expected outcome. Returns log::Level::Info. Reaching Debug / Trace requires an explicit Set-Log-Level and Set-Defau... (REQ_0810) control message or a builder override.