chore: release v0.1.15 (#408)

This PR updates the version to 0.1.15 after publishing to PyPI.

## Changes
- Updated version in `pyproject.toml` to 0.1.15
- Updated version in `src/claude_agent_sdk/_version.py` to 0.1.15
- Updated `CHANGELOG.md` with release notes

## Release Information
- Published to PyPI: https://pypi.org/project/claude-agent-sdk/0.1.15/
- Bundled CLI version: 2.0.62
- Install with: `pip install claude-agent-sdk==0.1.15`

🤖 Generated by GitHub Actions

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Claude <[email protected]>

Author: github-actions[bot]

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.1.15
+
+### New Features
+
+- **File checkpointing and rewind**: Added `enable_file_checkpointing` option to `ClaudeAgentOptions` and `rewind_files(user_message_id)` method to `ClaudeSDKClient` and `Query`. This enables reverting file changes made during a session back to a specific checkpoint, useful for exploring different approaches or recovering from unwanted modifications (#395)
+
+### Documentation
+
+- Added license and terms section to README (#399)
+
 ## 0.1.14
 
 ### Internal/Other Changes

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "claude-agent-sdk"
-version = "0.1.14"
+version = "0.1.15"
 description = "Python SDK for Claude Code"
 readme = "README.md"
 requires-python = ">=3.10"

src/claude_agent_sdk/_version.py

@@ -1,3 +1,3 @@
 """Version information for claude-agent-sdk."""
 
-__version__ = "0.1.14"
+__version__ = "0.1.15"