UniFi Etherlighting v0.4.0

• Added native Home Assistant color pickers for VLAN/network Etherlighting colors.
• Added color pickers for FE, GbE, 2.5GbE, 5GbE, and 10GbE link speeds.
• Color writes reproduce the confirmed UniFi UI setting update and unchanged Device refresh sequence.
• Every color write is independently read back and fails closed on unexpected changes.
• Added reversible live-capture evidence, offline validation, and regression coverage.