Refactor: Remove unused Whisper variants

This commit removes the `whisper_variant` and `whisper_hotwords_variant`
fields from the `run_id` generation and the `print_meta_summary`
function.

These variants are no longer used as the project is shifting focus to
LLM-based generation. The `run_full_case.rs` example has also been
updated to reflect this change.

server/tests/transcribe_test.rs

@@ -4,7 +4,6 @@ use std::path::PathBuf;
 use std::sync::Arc;
 use std::time::Duration;
 
-use doctate_server::config::WhisperUserSettings;
 use doctate_server::transcribe;
 use doctate_server::transcribe::ffmpeg::remux_faststart;
 use doctate_server::transcribe::ollama::{OllamaError, generate_oneliner};
@@ -79,7 +78,7 @@ async fn whisper_client_posts_multipart_and_returns_text() {
         &server.uri(),
         &fixture("sample.m4a"),
         Duration::from_secs(10),
-        &WhisperUserSettings::default(),
+        None,
     )
     .await
     .expect("transcribe failed");
@@ -103,7 +102,7 @@ async fn whisper_client_returns_status_error_on_500() {
         &server.uri(),
         &fixture("sample.m4a"),
         Duration::from_secs(10),
-        &WhisperUserSettings::default(),
+        None,
     )
     .await
     .expect_err("expected error");
@@ -133,7 +132,7 @@ async fn whisper_client_times_out() {
         &server.uri(),
         &fixture("sample.m4a"),
         Duration::from_millis(100),
-        &WhisperUserSettings::default(),
+        None,
     )
     .await
     .expect_err("expected timeout");
@@ -145,11 +144,9 @@ async fn whisper_client_times_out() {
 }
 
 #[tokio::test]
-async fn whisper_client_forwards_hotwords_and_prompt_when_set() {
+async fn whisper_client_forwards_explicit_language() {
     let server = MockServer::start().await;
 
-    // Accept any POST; inspect captured body below. language query param is
-    // still matched strictly to verify override from settings.
     Mock::given(method("POST"))
         .and(path("/asr"))
         .and(query_param("language", "en"))
@@ -159,71 +156,15 @@ async fn whisper_client_forwards_hotwords_and_prompt_when_set() {
         .await;
 
     let client = reqwest::Client::new();
-    let settings = WhisperUserSettings {
-        language: Some("en".into()),
-        hotwords: Some("HOCM Valsalva".into()),
-        initial_prompt: Some("Kardiologie".into()),
-    };
     transcribe(
         &client,
         &server.uri(),
         &fixture("sample.m4a"),
         Duration::from_secs(10),
-        &settings,
+        Some("en"),
     )
     .await
     .expect("transcribe failed");
-
-    let received = server.received_requests().await.unwrap();
-    let body = String::from_utf8_lossy(&received[0].body);
-    assert!(body.contains("name=\"hotwords\""), "hotwords part missing");
-    assert!(
-        body.contains("HOCM Valsalva"),
-        "hotwords value missing: {body}"
-    );
-    assert!(
-        body.contains("name=\"initial_prompt\""),
-        "initial_prompt part missing"
-    );
-    assert!(body.contains("Kardiologie"), "initial_prompt value missing");
-}
-
-#[tokio::test]
-async fn whisper_client_omits_empty_optional_fields() {
-    let server = MockServer::start().await;
-
-    // Default settings = all None → only `audio_file` part, language defaults
-    // to `de`. Assert that neither optional field appears in the body.
-    Mock::given(method("POST"))
-        .and(path("/asr"))
-        .and(query_param("language", "de"))
-        .respond_with(ResponseTemplate::new(200).set_body_string("ok"))
-        .expect(1)
-        .mount(&server)
-        .await;
-
-    let client = reqwest::Client::new();
-    transcribe(
-        &client,
-        &server.uri(),
-        &fixture("sample.m4a"),
-        Duration::from_secs(10),
-        &WhisperUserSettings::default(),
-    )
-    .await
-    .expect("transcribe failed");
-
-    // Inspect the captured request to confirm absence of the optional parts.
-    let received = server.received_requests().await.unwrap();
-    let body = String::from_utf8_lossy(&received[0].body);
-    assert!(
-        !body.contains("name=\"hotwords\""),
-        "hotwords part leaked: {body}"
-    );
-    assert!(
-        !body.contains("name=\"initial_prompt\""),
-        "initial_prompt part leaked: {body}"
-    );
 }
 
 #[tokio::test]