feat(agent): add open-ended research methodology

fix DSML token leak and use no-thinking model for all non-tool-bound paths

add deepseek compatibility

update supervisor nudging logic and fix tests

lint

feat: add format-strip finalizer and fail_safe fallback to supervisor_best_answer

feat: add supervisor review node to validate Final Answer candidates before finalization

feat: add print logs for memory, search, and tool operations

feat: supervisor requires concrete answer to finalize after nudge

feat: supervisor uses extra strong model with cheap fallback

strong model for supervisor

feat: YouTube fallback strategy + dataset file logging + BLAS thread safety

print more logs

updated to print

feat: rate limit resilience + formatter safety + fail-safe hard-caps

fix 3 layer memory ststem

test: fix broken tests after introducing extract_memory node

review: ship all 15 quick-win fixes from REVIEW.md via TDD

feat: implement web search and file processing tools with robust retrieval fallbacks