fix: resolve 75 mem-cli compilation errors

All errors were API mismatches — handler code calling wrong method
   names, wrong argument types, or missing imports/derives. No logic
   changes. Build now passes with SQLX_OFFLINE=true.

   Key fixes:
   - embed_text -> embed_one, Vector -> Vec<f32> conversion
   - extract_token: extract auth header from HttpRequest first
   - AuthError variants aligned to actual enum definition
   - recursive async fns boxed (dfs_paths in inference + path_finder)
   - missing derives (Default, Serialize), imports (sqlx::Row, Timelike)
   - borrow-after-move: compute .len() before struct field move
   - streaming_body -> streaming with Result<Bytes> for SSE
   - CI: add SQLX_OFFLINE=true for offline builds without DB

   25 files changed, 99 insertions(+), 81 deletions(-)

Co-authored-by: rock <[email protected]>

crates/mem-cli/src/handlers/semantic.rs

@@ -142,8 +142,8 @@ pub async fn search_entities_handler(
            body.query, body.entity_type, body.start_time, body.end_time);
 
     // 3. Embed query
-    let query_embedding = match state.embeddings.embed_text(&body.query).await {
-        Ok(emb) => emb,
+    let query_embedding = match state.embeddings.embed_one(&body.query).await {
+        Ok(emb) => emb.to_vec(),
         Err(e) => {
             error!("Embedding failed: {}", e);
             return crate::handlers::response_builder::internal_error(
@@ -278,8 +278,8 @@ pub async fn search_edges_handler(
            body.query, body.relation_type, body.start_time, body.end_time);
 
     // 3. Embed query
-    let query_embedding = match state.embeddings.embed_text(&body.query).await {
-        Ok(emb) => emb,
+    let query_embedding = match state.embeddings.embed_one(&body.query).await {
+        Ok(emb) => emb.to_vec(),
         Err(e) => {
             error!("Embedding failed: {}", e);
             return crate::handlers::response_builder::internal_error(
@@ -361,8 +361,8 @@ pub async fn hybrid_search_handler(
            body.query, body.semantic_weight, body.lexical_weight);
 
     // 3. Embed query
-    let query_embedding = match state.embeddings.embed_text(&body.query).await {
-        Ok(emb) => emb,
+    let query_embedding = match state.embeddings.embed_one(&body.query).await {
+        Ok(emb) => emb.to_vec(),
         Err(e) => {
             error!("Embedding failed: {}", e);
             return crate::handlers::response_builder::internal_error(