feat(kb): add with_bot_config to load embedding from bot config

- Adds KnowledgeBaseManager::with_default_config() as alias to new()
- Adds KnowledgeBaseManager::with_bot_config() to load embedding_url,
  embedding_model, and qdrant config from bot's config.csv
- Updates bootstrap to use with_bot_config with default_bot_id
- Enables per-bot embedding configuration instead of global env vars

src/core/kb/mod.rs

@@ -20,6 +20,8 @@ use std::sync::Arc;
 use tokio::sync::RwLock;
 use uuid::Uuid;
 
+use crate::core::shared::utils::DbPool;
+
 #[derive(Debug)]
 pub struct KnowledgeBaseManager {
     indexer: Arc<KbIndexer>,
@@ -29,6 +31,10 @@ pub struct KnowledgeBaseManager {
 
 impl KnowledgeBaseManager {
     pub fn new(work_root: impl Into<std::path::PathBuf>) -> Self {
+        Self::with_default_config(work_root)
+    }
+
+    pub fn with_default_config(work_root: impl Into<std::path::PathBuf>) -> Self {
         let work_root = work_root.into();
         let embedding_config = EmbeddingConfig::from_env();
         let qdrant_config = QdrantConfig::default();
@@ -47,6 +53,27 @@ impl KnowledgeBaseManager {
         }
     }
 
+    pub fn with_bot_config(work_root: impl Into<std::path::PathBuf>, pool: DbPool, bot_id: Uuid) -> Self {
+        let work_root = work_root.into();
+        let embedding_config = EmbeddingConfig::from_bot_config(&pool, &bot_id);
+        info!("KB Manager using embedding config from bot {}: url={}, model={}", 
+              bot_id, embedding_config.embedding_url, embedding_config.embedding_model);
+        let qdrant_config = QdrantConfig::from_config(pool, &bot_id);
+
+        let indexer = Arc::new(KbIndexer::new(embedding_config.clone(), qdrant_config));
+        let processor = Arc::new(DocumentProcessor::default());
+        let monitor = Arc::new(RwLock::new(KbFolderMonitor::new(
+            work_root,
+            embedding_config,
+        )));
+
+        Self {
+            indexer,
+            processor,
+            monitor,
+        }
+    }
+
     pub async fn index_kb_folder(
         &self,
         bot_id: Uuid,

src/main_module/bootstrap.rs

@@ -509,7 +509,7 @@ pub async fn create_app_state(
     );
 
     #[cfg(any(feature = "research", feature = "llm"))]
-    let kb_manager = Arc::new(crate::core::kb::KnowledgeBaseManager::new("work"));
+    let kb_manager = Arc::new(crate::core::kb::KnowledgeBaseManager::with_bot_config("work", pool.clone(), default_bot_id));
 
     #[cfg(feature = "tasks")]
     let task_engine = Arc::new(crate::tasks::TaskEngine::new(pool.clone()));