std.log.setLogLevel versus std.debug.print: Choosing Low‑Noise Alert Mechanism

Goal: Emit alert messages in a Zig program so that operators receive timely information without being flooded by diagnostic chatter.

Constraint: The standard logger (std.log) offers five severity levels and a global threshold via std.log.setLogLevel, but the level must be configured before the first log call; otherwise existing logger instances ignore later changes. In contrast, std.debug.print writes unconditionally to stderr, bypassing any level filter, which guarantees visibility but can produce persistent noise if left in production code.

Uncertainty: Developers need to decide whether to rely on pre‑start level filtering or unconditional debug prints to achieve low‑noise alerting, especially when verbosity might need to be adjusted after the program has begun running.

Questions: Which mechanism ensures that alert‑level messages appear in release builds while keeping trace/debug output suppressed? Can the logger’s level be changed safely after initialization without recreating the logger? Is there a way to conditionally compile std.debug.print calls so they are omitted in release modes?