release(python): metaobjects 0.15.4 — @via reference-hop support (PyPI)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BYCrkfarjiQBYUrhV77jN6

Author: claude

server/python/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "metaobjects"
-version = "0.15.3"
+version = "0.15.4"
 description = "Cross-language metadata standard: declare typed entities once, generate idiomatic drift-checked code across languages — Python port."
 readme = "README.md"
 requires-python = ">=3.11"