Increase default Docker JVM max heap from 1024m to 4096m

[anasomar1]

 Production workloads with large data volumes cause OutOfMemoryError crashes
 with the current 1GB max heap default in Docker Compose templates.

 Specific failure scenarios observed in production:
 - Indexing a data document with around 34,000 records and multiple fields
 - Running the scheduled job "clean_ArtifactData_daily" to clean millions of artifact hits was crashing when I restored production data on another server

 Both operations exhausted heap space and crashed the JVM with:
     java.lang.OutOfMemoryError: Java heap space

 Bumping the -Xmx default to 4096m resolved these issues without code changes.