Runtime log-level control

The only runtime knob taktora-log surfaces: DLT clients change per-Context-ID log levels at runtime by injecting control messages into dlt-daemon, which the DLT backend (taktora-log-dlt DLT-protoco... (FEAT_0072)) consumes and applies without restart.

Feature: Runtime per-context log-level control FEAT_0075
status: approved
satisfies: FEAT_0072
is satisfied by: REQ_0810, REQ_0811
is refined by: ARCH_0073

DLT clients (dlt-control, DLT Viewer’s injection panel) can change per-Context-ID log levels at runtime by injecting control messages into dlt-daemon. taktora-log-dlt shall consume those control messages from the daemon and apply them to its own per-context level table without restart. This is the only runtime knob taktora-log surfaces to the integrator.
Requirement: Set-Log-Level and Set-Default-Log-Level control messages REQ_0810
status: implemented
satisfies: FEAT_0075
is verified by: TEST_0810
links outgoing: BB_0091, TEST_0810

The DLT backend’s daemon-client receive half shall ingest AUTOSAR DLT Set-Log-Level and Set-Default-Log-Level control messages from dlt-daemon and shall apply them per Context ID via atomic store. Subsequent log::Log::enabled checks for that context shall short-circuit at the new level without re-emit cost. Unsupported control messages (file transfer, injection, FIBEX) shall be ignored without error.
Requirement: Production default level is INFO REQ_0811
status: implemented
satisfies: FEAT_0075
is verified by: TEST_0811
links outgoing: BB_0091, TEST_0811

The default log level applied at taktora-log-dlt init shall be INFO. DEBUG and TRACE shall be reachable only by explicit runtime opt-in through Set-Log-Level and Set-Defau... (REQ_0810) (or by an integrator’s compile-time builder override for development builds). The default shall not be DEBUG in any production default build.