feat(phase-0.2): ESPI Usage Domain Enums Batch 1

[dfcoffin]

Summary

Generate first batch of 5 core ESPI usage domain enumerations from espi.xsd schema.

Enums Created

• AccumulationKind (11 values) - How readings are accumulated over time
• CommodityKind (27 values) - Commodity classification (electricity, gas, water, etc.)
• DataQualifierKind (15 values) - Salient attributes of readings (average, max, min, etc.)
• FlowDirectionKind (22 values) - Flow direction for current-related readings
• MeasurementKind (125 values) - Physical measurement types (power, voltage, current, etc.)

Features

All enums include:

• ✅ Apache License 2.0 header (2025)
• ✅ JAXB/Jakarta XML annotations (@XmlEnum, @XmlEnumValue)
• ✅ Comprehensive Javadoc from XSD schema
• ✅ getValue() method returning int
• ✅ fromValue(int) static factory method
• ✅ Package: org.greenbuttonalliance.espi.common.domain.usage.enums

Test Results

• Unit tests: 638/638 passed ✅
• Integration tests: Require Docker (will run in CI/CD)

Based On

ESPI 4.0 espi.xsd schema (NAESB REQ.21)

🤖 Generated with Claude Code