v0.8.2

Changes

• fix(lpc): report real remote heartbeat/failsafe state, not our own @volschin (#80)
• fix(eebus): validate SKIs, wire trust-removal cleanup, add unpair RPC @volschin (#79)
• fix(ohpcf): raise ServiceValidationError for control rejections (HTTP 400) @volschin (#78)
• fix(ohpcf): surface control rejections as HomeAssistantError @volschin (#77)