feat(settings): add HTTP version as an inherited request setting

Adds an http_version setting (auto, HTTP/1.1, HTTP/2) to the existing
workspace/folder/request settings-override system, for servers that fail
when the negotiated version isn't the one they expect.

Forcing a version also constrains TLS ALPN on both the rustls and
native-tls paths, since hyper refuses to speak a protocol ALPN didn't
negotiate. The connection cache key now includes the options that affect
how the client is built (validate_certificates, http_version) so a
settings change takes effect on the next send instead of after the 10
minute client cache TTL.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: gschier

crates-server/yaak-web/bindings/gen_models.ts

@@ -157,6 +157,7 @@ impl PreparedSend {
         let (client, resolver) = HttpConnectionOptions {
             id: uuid::Uuid::new_v4().to_string(),
             validate_certificates: self.settings.validate_certificates,
+            http_version: self.settings.http_version,
             // The proxy connects directly. Going through a system proxy would move DNS, and
             // therefore the address check, somewhere this process can't see.
             proxy: HttpConnectionProxySetting::Disabled,