Further cleanup: disable remaining external service dependencies

Fix HF deployment: remove external deps, use pre-built files, download required assets

fix

saas: new rate limit policy

chore: tweak

chore: serp provider tweak

fix: cache batch interval

saas: save cache in batch

fix: internal serp does not support variants

saas(search): switch to internal serp

saas: minor tier policy tweak

saas: new tier policy

fix: timeout respect

fix

fix: add logging to serp

bump: deps

fix

fix: saas issus

fix: ua switch

saas: refactor proxy provider (#1186)

saas: remove sourcecode tip

saas: tweaks

fix: fallback term manipulation

fix: bug that does not accept original query

fix: serp edge case

fix: fallback logic (#1182)

serp: trim fallback terms

serp: use search expense id

fix: serp charge amount assignment

fix: serp usage

fix: serp index

feat: serp endpoint (#1180)

chore: check RTL language

chore: enable fallback by default for s.jina.ai

feat: support fallback query (#1179)

fix: try to partition apiroll query

saas: async auth/rate-limit path for high-freq keys

fix: expose status code/text from curl

saas: minor adjustments for search

fix: country code validation

fix: charge amount

fix: formatted usage entry

searcher: image/news/bing search (#1176)

saas: new rate limit policy

fix: curl failure should return 4xx if specified explicitly

feat: search return with date (#1173)

fix: readerlm params

fix: beware readerlm capacity drain

fix: do img filtering in node instead of browser

fix: bring back content based respond timing