docs: update CHANGELOG for v1.1.3

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

CHANGELOG.md

@@ -73,6 +73,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Comprehensive input schema definitions
 - Security audit of parameter handling
 
+## [1.1.3] - 2026-04-17
+
+### Fixed
+- **Large File Chunking**: Fixed issue #5 where reading large files (e.g. PDFs) caused a "Tool result is too large" error in Claude Desktop
+  - `obsidian_read_note` now returns at most 50,000 characters by default (configurable up to 500,000)
+  - New `max_chars` parameter caps the number of characters returned per call (default: 50000, max: 500000)
+  - New `offset` parameter enables pagination — pass the offset from the truncation message to read the next chunk
+  - When truncated, the response includes a message stating the total size and the exact `offset` to use for the next call
+
+### Documentation
+- **Obsidian Must Be Running**: Clarified in README (issue #4) that the Obsidian application must be open and running before any MCP tools are used
+  - Added prominent callout in Prerequisites section
+  - Expanded Troubleshooting entry with explanation of root cause and fix
+
 ## [1.1.2] - 2026-04-14
 
 ### Fixed
@@ -114,6 +128,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Version History
 
+- **1.1.3** - Bug fix release: Large file chunking for obsidian_read_note; docs clarification for Obsidian must be running (fixes #4, #5)
 - **1.1.2** - Bug fix release: Ampersand support in filenames (fixes #2)
 - **1.1.1** - Bug fix release: Quote escaping in note content
 - **1.1.0** - Bug fix release: Square brackets preservation in note content
@@ -122,7 +137,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Search & Discovery (12 tools)
   - Task & Property Management (8 tools)
 
-[1.1.2]: https://github.com/yourusername/obsidian-mcp/releases/tag/v1.1.2
+[1.1.3]: https://git.mortons.site/Peter.Morton/obsidian-mcp/releases/tag/v1.1.3
-[1.1.1]: https://github.com/yourusername/obsidian-mcp/releases/tag/v1.1.1
+[1.1.2]: https://git.mortons.site/Peter.Morton/obsidian-mcp/releases/tag/v1.1.2
-[1.1.0]: https://github.com/yourusername/obsidian-mcp/releases/tag/v1.1.0
+[1.1.1]: https://git.mortons.site/Peter.Morton/obsidian-mcp/releases/tag/v1.1.1
-[1.0.0]: https://github.com/yourusername/obsidian-mcp/releases/tag/v1.0.0
+[1.1.0]: https://git.mortons.site/Peter.Morton/obsidian-mcp/releases/tag/v1.1.0
+[1.0.0]: https://git.mortons.site/Peter.Morton/obsidian-mcp/releases/tag/v1.0.0