v1.9.0

v1.9.0 — Integration overhaul

Added

• Price sensor metrics as dedicated entities (market cap, volume, 1h-1y changes, supplies, ATH, rank) — 13 per coin
• Mining metrics as dedicated entities (difficulty, block height, retarget, halving, fees, hashrate, workers, blocks)
• sensor_descriptions.py: frozen+kw_only EntityDescription with value_fn
• 33 entity translation keys (EN + FR, vouvoiement) + icons.json + brand/ icons
• Automation examples + use cases in README

Changed

• Minimum HA bumped to 2025.11 (UpdateFailed retry_after)
• Structure: const/const.py → const.py, helper/ → api/, options_flow.py
• Perf: entry setup 0.77s → 0.01s (background first refresh)

Fixed

• Rate-limit backoff honors CoinGecko Retry-After
• no_results error lost in reconfigure flow
• Gitleaks false positive (translation_key)