tento-tz

tento-tz parses IANA tzdb source files and stores timezone transition data for runtime lookup.

Public surface

• TzdbParser parses bundled tzdb files.
• TzStore loads, saves, and queries generated transition data.
• TzListClient provides timezone list data for consumers.
• TentoTzContainer anchors persisted timezone data under a container root.
• Transition and Transitions are the serialized transition data shapes.
• TzLink and TzdbLinkParser expose link parsing for tzdb aliases.
• script_list(container) registers local commands for clearing, inspecting, and saving transition data.

Boundaries

This crate owns timezone database parsing and generated transition storage. Calendar logic should consume tento-chrono and ask tento-tz for transition data when needed; it should not parse tzdb files itself.

Generated timezone data is a build/runtime artifact. Keep the parser and store APIs explicit so hosts can choose whether to bundle data, mount container data, or regenerate transitions.