(rosetta): same class in different namespace is confusing

### Describe the bug

Rosetta might produce the following code which is very confusing to users:


And frankly even incorrect.

### Expected Behavior

One of the classes needs to be renamed, or they need to be referenced by package name.

### Current Behavior

Both have simple imports which isn't valid Java.

### Reproduction Steps

See above

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### SDK version used

-

### Environment details (OS name and version, etc.)

-

Start by reproducing the Rosetta output shown in the issue and inspect the generated Java imports for the same-named classes. Trace the Rosetta generation entry point responsible for Java imports, then add coverage for classes sharing a simple name across namespaces. Done means the generated Java uses distinct names or package-qualified references and remains valid Java.

Written by the indexing model from the issue text.