From 8046da77280a00c04dabae65bb11cd2c7582f941 Mon Sep 17 00:00:00 2001
From: Joey Yakimowich-Payne <jyapayne@pm.me>
Date: Thu, 16 Apr 2026 13:53:37 -0600
Subject: [PATCH] feat(rete): add FilterNode with registered predicates (P1.9)

FilterNode applies registered predicates to tokens via PredicateRegistry. Conjunction (AND) semantics across multiple FilterSpecs. Constructor-time validation throws UnknownPredicateError for missing predicates. Tracks passed tokens so left-deactivate routes only forwarded matches. Updated PredicateFn signature to accept static args alongside bindings. 100% line/func coverage; 8 unit tests covering pass/block/AND/deactivate paths.