feat(fxconfig): parse namespace policies into readable strings

[aaa-aashna]

Type of change

• Improvement (improvement to code, performance, etc)

Description

Implemented readable namespace policy parsing for fxconfig namespace list.

Changes made:

• Added parsePolicy() implementation
• Converted namespace policy bytes into readable string output
• Added PolicyStr to NamespaceQueryResult
• Preserved raw bytes internally while exposing human-readable policy text

Validation

• Verified project builds successfully using:

go build ./...

Closes #195

[aaa-aashna]

Implemented the requested namespace policy parsing enhancement for fxconfig namespace list.

Please let me know if any refinements or tests are needed. Thank you for reviewing.