Improve test coverage to 88.02%
Adds tests covering:
- Aprsme.Packet edge cases (already committed)
- Encoding valid_codepoint? branches via slow grapheme path and encoding_info shapes
- ErrorHandler database/network error categorization (CastError, ConstraintError, QueryError, Postgrex.Error, RuntimeError circuit_open/timeout, custom map :reason)
- HealthCheck plug ask_shutting_down? nil and unresponsive-pid paths
- SpatialPubSub ensure_float branches, dateline broadcast wrap-around, monitored client DOWN handler, no-coordinate broadcast skip
- DataBuilder weather popup, weather-only fallback, tuple value conversion, string weather convert_unit branches
- DeviceIdentification fetch_devices_from_url default-arg head
- PageController format_uptime branches via fake Aprsme.Is GenServer
- WeatherLive.CallsignView compare_timestamps branches via :weather_packet messages
- PacketConsumer field-conversion private helpers via crafted handle_events events
Graham McIntire
f9cfbf630e