Add a new POST edit Workload endpoint and update the GET

[lujunsan]

Adds a new Update Workload (PUT) endpoint and updates the GET endpoint to return the RunConfig information.

Example body for the POST /api/v1beta/workloads/fetch-isolated/edit :

    "image": "ghcr.io/stackloklabs/gofetch/server:latest",
    "host": "127.0.0.1",
    "cmd_arguments": [
      "--port",
      "8080"
    ],
    "target_port": 33333,
    "env_vars": [
      "FASTMCP_PORT=52814",
      "MCP_PORT=52814",
      "MCP_TRANSPORT=streamable-http"
    ],
    "secrets": [],
    "volumes": [],
    "transport": "streamable-http",
    "authz_config": "",
    "oidc": {
      "issuer": "",
      "audience": "",
      "jwks_url": "",
      "introspection_url": "",
      "client_id": "",
      "client_secret": ""
    },
    "permission_profile": {
      "network": {
        "outbound": {
          "allow_host": [
            "google.es"
          ],
          "allow_port": [
            443,
            4431
          ]
        }
      }
    },
    "proxy_mode": "sse",
    "network_isolation": true,
    "tools": null
  }

Example response for the PUT (same as POST):

{
    "name": "fetch-isolated",
    "port": 33404
}

Example response for the updated GET:

{
        "name": "fetch-isolated",
        "image": "ghcr.io/stackloklabs/gofetch/server:latest",
        "host": "127.0.0.1",
        "cmd_arguments": [
            "--port",
            "8080"
        ],
        "target_port": 33333,
        "env_vars": [
            "FASTMCP_PORT=33333",
            "MCP_PORT=33333",
            "MCP_TRANSPORT=streamable-http"
        ],
        "secrets": [],
        "volumes": [],
        "transport": "streamable-http",
        "authz_config": "",
        "oidc": {
            "issuer": "",
            "audience": "",
            "jwks_url": "",
            "introspection_url": "",
            "client_id": "",
            "client_secret": ""
        },
        "permission_profile": {
            "network": {
                "outbound": {
                    "allow_host": [
                        "google.es"
                    ],
                    "allow_port": [
                        443,
                        4431
                    ]
                }
            }
        },
        "proxy_mode": "sse",
        "network_isolation": true,
        "tools": null
}

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