chore: bump version to 0.4.0rc17

Author: waterbang

README.md

@@ -2,7 +2,7 @@
 
 **English** | [中文](README.zh-CN.md) | [日本語](README.ja.md)
 
-> Status: **0.4.0rc16** (Release Candidate). Expect breaking changes while we harden UX and contracts.
+> Status: **0.4.0rc17** (Release Candidate). Expect breaking changes while we harden UX and contracts.
 
 CCCC is a **local-first multi-agent collaboration kernel** that feels like a modern IM, but stays reliable because it is backed by:
 
@@ -108,7 +108,7 @@ RC tags (e.g. `v0.4.0-rc16`) are published to **TestPyPI**. Use PyPI for depende
 ```bash
 python -m pip install --index-url https://pypi.org/simple \
   --extra-index-url https://test.pypi.org/simple \
-  cccc-pair==0.4.0rc16
+  cccc-pair==0.4.0rc17
 ```
 
 Note: at the moment, the latest stable on PyPI is still the legacy v0.3.x line. Use the command above to install 0.4.x RCs.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cccc-pair"
-version = "0.4.0rc16"
+version = "0.4.0rc17"
 description = "Global multi-agent delivery kernel with working groups, scopes, and an append-only collaboration ledger"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.9"