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/query/faceted_search.rs

@@ -3,7 +3,7 @@
 //! Enables multi-dimensional filtering across entities and edges.
 //! Supports entity types, relation types, date ranges, confidence levels, and more.
 
-use chrono::{DateTime, Utc};
+use chrono::{DateTime, Timelike, Utc};
 use serde::{Deserialize, Serialize};
 use sqlx::{Pool, Postgres};
 use std::collections::HashMap;
@@ -42,7 +42,7 @@ pub struct AvailableFacets {
 }
 
 /// Facet filters for a query
-#[derive(Debug, Clone, Default, Deserialize)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct FacetFilters {
     /// Filter by entity types (OR within facet, AND across facets)
     pub entity_types: Option<Vec<String>>,