feat: adding auth_token and jwks_uri in yaml for oauth support

[Hardikl]

Adding these in ontap.yaml

Defaults:
  auth_token: AUTH_TOKEN
  jwks_uri: http://<KEYCLOAK>/realms/<REALM>/protocol/openid-connect/certs

[Copilot]

Pull request overview

This PR introduces optional OAuth-style bearer JWT validation for the MCP HTTP endpoint, driven by new Defaults.auth_token and Defaults.jwks_uri YAML configuration, and updates the sample config and Go module dependencies accordingly.

Changes:

• Adds JWT verification and JWKS fetch/cache logic to the HTTP server request path.
• Extends YAML config schema to allow auth_token and jwks_uri under Defaults.
• Updates ontap-example.yaml and adds github.com/golang-jwt/jwt/v5 dependency.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
server/server.go	Adds OAuth/JWT enforcement in the HTTP handler plus JWKS fetching/caching and JWK→RSA key conversion.
config/config.go	Adds auth_token and jwks_uri fields to the Poller struct used by Defaults.
ontap-example.yaml	Documents the new Defaults.auth_token and Defaults.jwks_uri settings.
go.mod	Adds github.com/golang-jwt/jwt/v5 dependency.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 14 comments.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 10 comments.

[rahulguptajss]

Auth is better?

[Hardikl]

Just Auth or OAuth may treated as one of authentication supported on ontap as mentioned here: https://netapp.github.io/ontap-mcp/nightly/prepare-ontap/#authentication

[Copilot]

Pull request overview

Copilot reviewed 10 out of 11 changed files in this pull request and generated 9 comments.

[Copilot]

Pull request overview

Copilot reviewed 12 out of 13 changed files in this pull request and generated 7 comments.