docs: star history for funsies (#237)

* docs: star history for funsies

Author: pm7y

.gitignore

@@ -353,3 +353,5 @@ my.env
 .DS_Store
 .sonarqube
 .scannerwork
+.claude
+.specify

README.md

@@ -120,3 +120,9 @@ For detailed documentation, see the **[Wiki](https://github.com/pm7y/AzureEventG
 
 See the [Architecture](https://github.com/pm7y/AzureEventGridSimulator/wiki/Architecture) page for system design details
 and the [Wiki](https://github.com/pm7y/AzureEventGridSimulator/wiki) for development guidelines.
+
+## Star History
+
+This is a small project but has seen steady growth over time. Thank you to everyone who has starred the repository!
+
+[![Star History Chart](https://api.star-history.com/svg?repos=pm7y/AzureEventGridSimulator&type=date&legend=bottom-right)](https://www.star-history.com/#pm7y/AzureEventGridSimulator&type=date&legend=bottom-right)