release(v4.8.4): bump framework and eight skills to 4.8.4 in lockstep; archive PR #47 reviews (two rounds)

The .claude/skills check accepts both local layouts and fails on a dangling
link. Review: round 1 (@e1ed270) claude agy grok PASS, codex NOT PASS (a
dangling top-level link was skipped); fixed in 150b493; round 2 4/4 PASS.
Reports and the round-2 identity sidecars go to .agents/reports/<session>/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

.agents/skills/lib_py/loop/eager.py

@@ -13,7 +13,7 @@ import sys
 from typing import List, Sequence
 
 # Framework version locked with framework constants
-FRAMEWORK_VERSION = "4.8.3"
+FRAMEWORK_VERSION = "4.8.4"
 
 CORE_MODULES: Sequence[str] = (
     # Standard library modules