chore(release): auto-bump version to 0.66.4 — earned by # (minor: converged release (push-to-master bump))

Promotion record: (unknown)

src/rune/__init__.py

@@ -6,7 +6,7 @@ This is the main entry point for the Rune program.
 import json
 from pathlib import Path
 
-__version__ = "0.66.3"
+__version__ = "0.66.4"
 
 # One build identity (handoff 2026-09-10 §4): the semantic version above is
 # the repo-level truth (auto-bumped at merge); the DEPLOYED revision (exact