Previously pchome_crawler.py only had low-level crawling primitives.
All high-level functions used by openclaw_bot_routes.py were missing,
causing _PCHOME_AVAILABLE = False on startup and '簡報生成失敗' errors.
Implemented:
search_pchome(keyword, limit) — simplified search → list of dicts
find_best_match(keyword, momo_price) — best PChome match for a product
compare_product(name, price, icode) — single momo vs PChome comparison
batch_compare_top(db, top_n, date) — batch compare TOP-N momo hottest
save_matches(db, results) — persist results to pchome_matches
ensure_tables(db) — idempotent table creation
fmt_compare_msg(results, keyword) — Telegram Markdown single-item msg
fmt_daily_report(results, date_str) — Telegram Markdown daily report msg
After this commit _PCHOME_AVAILABLE will be True and competitor PPT
generation will no longer throw RuntimeError.
