fix(core): reject a plain Mcp-Param or Mcp-Name value with invalid characters - #3063

{ "workflowData": { "owner": "modelcontextprotocol", "repo": "typescript-sdk", "sha": "f7476ad48337c8f0fd16ebb8a11abf494b93aac5", "ref": "3063", "headBranch": null }, "key": "9RZwP8IjNO", "runId": 40612721066, "webhookDebug": { "action": "requested", "head_branch": "fix/mcp-param-invalid-chars", "head_repository_full_name": "chrikrah/typescript-sdk", "full_name": "modelcontextprotocol/typescript-sdk", "isPullRequest": true, "prNumber": 3063, "prNumberType": "number", "isNewPullRequest": true, "isOldPullRequest": false, "prKey": "chrikrah/typescript-sdk:fix/mcp-param-invalid-chars", "oldPrDataHash": "KDK2xph9Ky", "lookupKey": "chrikrah/typescript-sdk:fix/mcp-param-invalid-chars", "data": { "owner": "modelcontextprotocol", "repo": "typescript-sdk", "sha": "f7476ad48337c8f0fd16ebb8a11abf494b93aac5", "ref": "3063", "headBranch": null } }, "currentCursor": { "sha": "abf71d5566b3aab568786792a443d2fe54f252f5", "timestamp": 40233913404 }, "pkgPrNewVersion": "0.0.92" }