init: Redis-backed Pokémon 雷達 API

- radar_fetcher.py：呼叫 Function Server 抓 twpkinfo.com 資料後寫入 Redis (TTL 300s)
- pokemon_radar_api.py：FastAPI /scan，從 Redis 讀取並依 request 即時二次篩選；Redis 不可用時回 200 空結果，不再 500
- pokemon_location_fetcher.py：舊版 CLI，仍由 fetch_and_upload.sh 使用
- 文件：README (參考手冊)、QUICKSTART (操作指南)、SUMMARY (故事線)、CLAUDE.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

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+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv
+
+# Secrets / local state
+.env
+state.json
+
+# Runtime outputs
+pokemon_data.json
+pokemon_data.csv
+pokemon_data_raw.json
+last_pokemon_data.json
+screenshot.png
+