* feat(plugins): add web fetch provider boundary * feat(plugins): add web fetch provider modules * refactor(web-fetch): remove remaining core firecrawl fetch config * fix(web-fetch): address review follow-ups * fix(web-fetch): harden provider runtime boundaries * fix(web-fetch): restore firecrawl compare helper * fix(web-fetch): restore env-based provider autodetect * fix(web-fetch): tighten provider hardening * fix(web-fetch): restore fetch autodetect and compat args * chore(changelog): note firecrawl fetch config break
