Parse SPELLENERGIZELOG (victim/caster packed GUIDs + spellId + powerType +
amount) and emit ENERGIZE combat text for mana/energy gains. Add ENERGIZE
to CombatTextEntry::Type enum (blue +N text).
Also add explicit renderCombatText cases for BLOCK, PERIODIC_DAMAGE,
PERIODIC_HEAL, and ENVIRONMENTAL — previously all fell through to the
colourless default handler.