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/community_detector.rs

@@ -185,9 +185,9 @@ impl CommunityDetector {
 
                 communities_vec.push(Community {
                     id: comm_id,
+                    size: members.len(),
                     entity_ids: members.into_iter().collect(),
                     entity_names,
-                    size: members.len(),
                     modularity_contribution: modularity_contrib,
                     average_strength: strength,
                     density,
@@ -196,9 +196,9 @@ impl CommunityDetector {
         }
 
         // 5. Calculate total modularity
-        let total_modularity = communities_vec
+        let total_modularity: f64 = communities_vec
             .iter()
-            .map(|c| c.modularity_contribution)
+            .map(|c| c.modularity_contribution as f64)
             .sum();
 
         let average_community_size = if communities_vec.is_empty() {
@@ -210,9 +210,9 @@ impl CommunityDetector {
         let result = CommunityDetectionResult {
             entity_count: entities.len(),
             edge_count: edges.len(),
-            communities: communities_vec,
             community_count: communities_vec.len(),
-            total_modularity: total_modularity.max(-1.0).min(1.0),
+            communities: communities_vec,
+            total_modularity: total_modularity.max(-1.0).min(1.0) as f32,
             average_community_size,
         };