v0.3.6

Added

• Gap reconciliation for MQTT disconnects in energy accumulators.
• Connection sensor now exposes gap metadata (last_gap_started_at, last_gap_ended_at, last_gap_seconds, gap_event_id).
• Diagnostics now include gap reconciliation metadata.

Changed

• Energy accumulation during reconnect no longer assumes last power for the full offline duration.
• For detected gaps, estimated gap energy is calculated via trapezoidal interpolation between last pre-disconnect power and first post-reconnect power.

Safety

• Gap reconciliation only applies for outages between 60 seconds and 6 hours.
• Longer outages are logged and skipped to avoid unrealistic corrections.