Solcast calibration fix, MCP security, HA History optimisation

What's Changed

• docs(debug-journal): fold the 2026-10-31..11-08 queue slice (14 of 15 candidates); consolidate the largest areas by @springfall2008 in #6058
• fix(solcast): stop Solcast integration P10/P90 compounding on every PV fetch (#6049) by @chalfontchubby in #6055
• fix(history): read the History view's event entities untracked by @springfall2008 in #6061
• fix(mcp): advertise the client's https scheme behind a TLS-terminating proxy (#6056) by @springfall2008 in #6057
• fix(db): pass HAHistory's from_time through to the database by @springfall2008 in #6062

Full Changelog: v9.7.5...v9.7.6