WaitFor for Qdrant

[Alirexaa]

Description

Adds WaitFor support for Qdrant

Related: #5645

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Link to aspire-docs issue:
  • No

Microsoft Reviewers: Open in CodeFlow

[sebastienros]

I know this hasn't been done anywhere else but maybe we could start using TryGetValue to save a lookup. Aspire will be so much faster after that ;)

Suggested change

	if (connectionBuilder.ContainsKey("Endpoint") && Uri.TryCreate(connectionBuilder["Endpoint"].ToString(), UriKind.Absolute, out var serviceUri))
	if (connectionBuilder.TryGetValue("Endpoint", out var endpoint) && Uri.TryCreate(endpoint.ToString(), UriKind.Absolute, out var serviceUri))

[sebastienros]

Is it technically possible that this client has any default headers coming from other configuration?

Suggested change

	if (key is not null)
	if (key is not null && !client.DefaultRequestHeaders.Contains("Api-Key"))

[Alirexaa]

I used named clients, so we don't need this.

[sebastienros]

Digging a little more into the HttpClient usage here, I wonder if it would be better to resolve it in CheckHealthAsync instead and dispose it in this same method to follow a better IHttpClientFactory pattern instead of keeping a long-lived instance around. And then the named client could be configured on registration like this:

builder.Services.AddHttpClient(
    "qdrant-healthchecks",
    client =>
    {
        // Set the base address of the named client.
        client.BaseAddress = ...;

        client.DefaultRequestHeaders.Add("Api-Key", ...)
    });