fix: restore accidentally deleted type definitions

Add back PipelineType enum, ProcessorType::pipeline() method, and
OLLAMA_URL/EMBED_URL/LLM_HEALTH_URL config constants — all of
which were deleted in commits 78923a89 and 0856b92e while the
referencing code was left intact, causing 5 compilation errors.

src/core/config.rs

@@ -276,6 +276,22 @@ pub mod llm {
     });
 }
 
+/// Ollama embedding endpoint (vector embeddings for text sync).
+pub static OLLAMA_URL: Lazy<String> =
+    Lazy::new(|| env::var("MOMENTRY_OLLAMA_URL").unwrap_or_else(|_| "http://127.0.0.1:11434".to_string()));
+
+/// Text embedding server (comic-embed or alternative).
+pub static EMBED_URL: Lazy<String> =
+    Lazy::new(|| env::var("MOMENTRY_EMBED_URL").unwrap_or_else(|_| "http://127.0.0.1:11436".to_string()));
+
+/// LLM health endpoint.
+pub static LLM_HEALTH_URL: Lazy<String> = Lazy::new(|| {
+    env::var("MOMENTRY_LLM_HEALTH_URL").unwrap_or_else(|_| {
+        let chat = llm::CHAT_URL.clone();
+        chat.trim_end_matches("/v1/chat/completions").to_string() + "/health"
+    })
+});
+
 pub static SFTPGO_BASE_URL: Lazy<String> = Lazy::new(|| {
     env::var("SFTPGO_BASE_URL").unwrap_or_else(|_| "http://127.0.0.1:8080".to_string())
 });