nx_privlog_gate.nx

nx_privlog_gate.nx -- INDEPENDENT GATE: privilege assertion, waiver, and the FRCP 26(b)(5)(A) log. ZERO storage. Teeth: attorney-client needs ALL FIVE elements (a lawyer copied on a business email is NOT privileged); OPINION work product survives ANY showing of need and hardship while FACT work product yields to both; FRE 502(b) needs all THREE prongs or the disclosure is a waiver; and a withheld document with no log entry is counted as exposure, because withholding without logging is itself a route to waiver. The attorney-client test is swept EXHAUSTIVELY over all 32 element combinations and work product over every (tier x need x hardship) cell, so the invariants -- exactly one AC combination qualifies, and opinion work product is NEVER discoverable anywhere -- are proven rather than sampled. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0