feat: add Vision LLM integration (CLIP + Qwen3-VL cascade)

- Add Qwen3-VL dynamic management (start/stop/status CLI)
- Add CLIP + Qwen3-VL cascade detection strategy
- Add Vision CLI commands (vision start/stop/status, detect)
- Add cascade_vision processor module
- Add clip processor module
- Add qwen_vl_manager module

Changes:
- scripts/start_qwen3vl.sh, stop_qwen3vl.sh: Qwen3-VL management scripts
- src/core/vision/: Qwen3-VL manager module
- src/core/processor/cascade_vision.rs: CLIP + Qwen3-VL cascade logic
- src/core/processor/clip.rs: CLIP classification and detection
- src/api/clip_api.rs: CLIP API endpoints
- src/cli/vision.rs: Vision CLI implementation
- src/cli/args.rs: Add Vision and Detect commands
- src/main.rs: Integrate Vision CLI
- src/core/mod.rs: Add vision module
- src/core/processor/mod.rs: Add cascade_vision module

src/main.rs

@@ -124,6 +124,17 @@ async fn main() -> Result<()> {
         } => {
             handle_n8n(action, api_key, label, expires_in_days).await?;
         }
+        Commands::Detect {
+            image,
+            objects,
+            cascade,
+            threshold,
+        } => {
+            cli::vision::handle_detect_command(image, objects, cascade, threshold).await?;
+        }
+        Commands::Vision(cmd) => {
+            cli::vision::handle_vision_command(cmd).await?;
+        }
     }
 
     Ok(())