chore: bump version to 2.1.0-beta

Updated project version from 2.0.0-beta to 2.1.0-beta for new development cycle.

Changes:
- Set revision to 2.1.0-beta in root pom.xml
- Updated yaci-indexer version to 2.1.0-beta

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Mateusz Czeladka

pom.xml

@@ -26,7 +26,7 @@
     </licenses>
 
     <properties>
-        <revision>2.0.0-beta</revision>
+        <revision>2.1.0-beta</revision>
         <java.version>24</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <version.spring-boot>3.5.0</version.spring-boot>

yaci-indexer/pom.xml

@@ -10,7 +10,7 @@
     </parent>
 
     <artifactId>yaci-indexer</artifactId>
-    <version>1.0.0</version>
+    <version>2.1.0-beta</version>
     <name>yaci-indexer</name>
 
     <description>yaci-indexer</description>