Replace hardcoded namespace "santhosh" with configurable values

[haroon0x]

Description

The Kubernetes namespace "santhosh" is hardcoded in multiple places. This should be parameterized or use a more generic default like "kubeflow" or "docs-agent".

Affected Files

• server/app.py - duplicated hardcoded values
• server-https/app.py - duplicated hardcoded values
• pipelines/kubeflow-pipeline.py (line 258) - milvus_host default
• pipelines/incremental-pipeline.py (line 354) - milvus_host default
• README.md - example commands reference santhosh namespace

Proposed Fix

Change defaults to use generic namespace placeholders like kubeflow or default.

[MayankJha0333]

@haroon0x I went through the entire codebase and noticed that some resources are still using the santosh namespace and an outdated hostUrl, which could cause deployment and routing issues.

Affected Files

Manifests

• manifests/inference-service.yaml
• manifests/milvus-deployment.yaml
• manifests/serving-runtime.yaml

Pipelines

• pipelines/github_rag_pipeline.yaml
• pipelines/github_rag_incremental_pipeline.yaml
• pipelines/README.md

Deployments

• server/deployment.yaml
• server-https/deployment.yaml

VirtualService

• server-https/virtualservice.yaml

I’m planning to update these in my next commit.
Please let me know if you’d prefer that I revert these changes instead.