[Bug]: @example s not generating correct open api doc

[sconnon-repay]

Describe the bug

2 separate issues here. Full reproducible examples below

1. When using multiple @example s on a single model, only the latest is appended to the output open API yaml
2. When using @examples inside aliased types, no example is generated and there are no compiler errors (if this is invalid usage)

Apologies if this is a duplicate, github search for "@example" gives me 100s of unrelated issues

Reproduction

Issue 1

Input:

import "@typespec/http";
import "@typespec/openapi3";

using TypeSpec.Http;

@service({
  title: "Widget Service",
})

namespace X;

@example(#{ name: "Max", age: 3 }, #{ title: "Minimal examples", description: "Minimal examples" })
@example(
  #{ name: "Rex", age: 8, bark: true },
  #{ title: "With optional properties", description: "Example where the pet barks" }
)
model Pet {
  name: string;
  age: int32;
  bark?: boolean;
}

Output: NOTE that "Max" is gone

openapi: 3.0.0
info:
  title: Widget Service
  version: 0.0.0
tags: []
paths: {}
components:
  schemas:
    Pet:
      type: object
      required:
        - name
        - age
      properties:
        name:
          type: string
        age:
          type: integer
          format: int32
        bark:
          type: boolean
      example:
        name: Rex
        age: 8
        bark: true

Issue 2

import "@typespec/http";
import "@typespec/openapi3";

using TypeSpec.Http;

@service({
  title: "Widget Service",
})

namespace X;

model Pet {
  name: string;
  age: int32;
  bark?: boolean;
}

alias Pet200 = { 
  @statusCode statusCode: 200; 
  @example(#{ name: "Max", age: 3 }, #{ title: "Minimal examples", description: "Minimal examples" })
  @body body: Pet; 
};

alias Pet201 = { 
  @statusCode statusCode: 201;
  @example(
    #{ name: "Rex", age: 8, bark: true },
    #{ title: "With optional properties", description: "Example where the pet barks" }
  )
  @body body: Pet; 
};

@route("pet")
@post()
op post(): Pet200 | Pet201;

Output: NOTE no examples

openapi: 3.0.0
info:
  title: Widget Service
  version: 0.0.0
tags: []
paths:
  /pet:
    post:
      operationId: post
      parameters: []
      responses:
        '200':
          description: The request has succeeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Pet'
        '201':
          description: The request has succeeded and a new resource has been created as a result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Pet'
components:
  schemas:
    Pet:
      type: object
      required:
        - name
        - age
      properties:
        name:
          type: string
        age:
          type: integer
          format: int32
        bark:
          type: boolean

Checklist

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• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.