Rename: Kagenti → Rossoctl throughout scripts and docs

[yoavkatz]

Summary

Kagenti was renamed to Rossoctl. This issue tracks updating all references in the exgentic_a2a_runner scripts and documentation.

Files affected

• deploy-agent.sh, deploy-benchmark.sh, delete-all-deployments.sh — variable names, API references, Keycloak realm/client names
• sync-image-to-cluster.sh — kind cluster name default
• evaluate-benchmark.sh — OTEL collector namespace
• analyze-run.sh — namespace defaults and help text
• libsh/urls.sh — rossoctl_api_url() function and URL patterns
• libsh/check-kubectl-context.sh — expected kind context name (kind-rossoctl)
• k8s/job.yaml — secret reference
• authbridge/apply-pipeline.sh, authbridge/pipeline-merge.py, authbridge/plugins/token-exchange.yaml — operator/namespace references
• pyproject.toml — package description
• exgentic_a2a_runner/__init__.py — module docstring
• AUTHBRIDGE_PIPELINE_SPEC.md, IMPLEMENTATION_CHECKLIST.md, docs/workflow-diagrams.md — documentation

Changes

• 189 occurrences replaced: KAGENTI → ROSSOCTL, Kagenti → Rossoctl, kagenti → rossoctl
• Covers k8s namespace (rossoctl-system), Keycloak realm/client (rossoctl), kind cluster (kind-rossoctl), API variable names, shell function names, and all prose