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/api/server.rs

@@ -20,9 +20,9 @@ use super::identity_agent_api;
 use super::identity_api;
 use super::identity_binding;
 use super::llm_search;
-use super::pipeline;
 use super::media_api;
 use super::middleware::unified_auth;
+use super::pipeline;
 use super::processing;
 use super::scan;
 use super::search::search_routes;
@@ -117,6 +117,7 @@ pub async fn start_server(host: &str, port: u16) -> anyhow::Result<()> {
         .merge(identity_agent_api::identity_agent_routes())
         .merge(five_w1h_agent_api::five_w1h_agent_routes())
         .merge(media_api::bbox_routes())
+        .merge(media_api::media_proxy_routes())
         .merge(trace_agent_api::trace_agent_routes())
         .merge(search_routes())
         .merge(llm_search::llm_smart_routes())