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/db/postgres_db.rs

@@ -395,6 +395,14 @@ pub struct MonitorJobStats {
     pub failed: i32,
 }
 
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
+#[serde(rename_all = "snake_case")]
+pub enum PipelineType {
+    Frame,
+    Time,
+    Cross,
+}
+
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
 #[serde(rename_all = "snake_case")]
 pub enum ProcessorType {
@@ -559,6 +567,23 @@ impl ProcessorType {
             ProcessorType::FiveW1H,
         ]
     }
+
+    pub fn pipeline(&self) -> PipelineType {
+        match self {
+            ProcessorType::Yolo
+            | ProcessorType::Ocr
+            | ProcessorType::Face
+            | ProcessorType::Pose
+            | ProcessorType::VisualChunk => PipelineType::Frame,
+
+            ProcessorType::Asr
+            | ProcessorType::Cut
+            | ProcessorType::Asrx
+            | ProcessorType::Scene
+            | ProcessorType::Story
+            | ProcessorType::FiveW1H => PipelineType::Time,
+        }
+    }
 }
 
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq)]