[BUG] operationMessagesUnambiguity rule throws error if operation or message is not a $ref.

[kamil1094]

Describe the bug.

I'm getting error like this:

cause: TypeError: Cannot read properties of undefined (reading 'startsWith')
        at /Users/kamil/workdir/tempBundler/node_modules/@asyncapi/parser/cjs/ruleset/v3/functions/operationMessagesUnambiguity.js:31:27
        at Array.forEach (<anonymous>)
        at /Users/kamil/workdir/tempBundler/node_modules/@asyncapi/parser/cjs/ruleset/v3/functions/operationMessagesUnambiguity.js:30:71
        at Object.function (/Users/kamil/workdir/tempBundler/node_modules/@stoplight/spectral-core/dist/ruleset/function.js:83:16)
        at lintNode (/Users/kamil/workdir/tempBundler/node_modules/@stoplight/spectral-core/dist/runner/lintNode.js:29:46)
        at cb (/Users/kamil/workdir/tempBundler/node_modules/@stoplight/spectral-core/dist/runner/runner.js:43:45)
        at mapped.<computed> (/Users/kamil/workdir/tempBundler/node_modules/@stoplight/spectral-core/dist/runner/runner.js:85:17)
        at _callbacks.<computed> (/Users/kamil/workdir/tempBundler/node_modules/nimma/dist/legacy/cjs/runtime/proxy-callbacks.js:31:9)
        at Scope.emit (/Users/kamil/workdir/tempBundler/node_modules/nimma/dist/legacy/cjs/runtime/scope.js:109:19)
        at $.operations.* (eval at query (/Users/kamil/workdir/tempBundler/node_modules/nimma/dist/legacy/cjs/core/index.js:66:71), <anonymous>:21:11)

after using .validate() method on AsyncAPI document that contains operations with channel and messages components specified like the one below(without using $ref)

sendBranchCreatedToAnalyticsExchange:
    action: send
    channel:
      address: analytics
      messages:
        branchCreatedMessage:
          title: Branch created message
          summary: Event fired after a branch is created.
          payload:
            title: Branch created payload
              - type: object
                properties:
                  type:
                    type: string
                    const: something.branch.created
                    example: something.branch.created
                required:
                  - type
      bindings:
        amqp:
          is: routingKey
          exchange:
            name: analytics
            type: topic
            durable: true
            autoDelete: false
            vhost: /
          bindingVersion: 0.3.0
    messages:
      - title: Branch created message
        summary: Event fired after a branch is created.
        payload:
          title: Branch created payload
          allOf:
            - title: Base API event message
              type: object
              properties:
                id:
                  type: string
                  description: Event ID.
                  pattern: '^evt_[0-9abcdefghjkmnpqrstvwxyz]{26}$'
                  example: evt_01h1s5z6vf2mm1mz3hevnn9va7
              required:
                - id
    bindings:
      amqp:
        cc:
          - branch.created
        ack: false
        bindingVersion: 0.3.0

Expected behavior

I can validate document containing operations like the one specified above without getting errors.

Screenshots

How to Reproduce

1. Create AsyncAPI document with operation specified above
2. Try to validate document using @asyncapi/parser .validate method

🥦 Browser

None

👀 Have you checked for similar open issues?

• I checked and didn't find similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue ?

Yes I am willing to submit a PR!

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