feat(cli): add --timings flag and enrich error tracking fields

Add -t/--timings flag to the sync subcommand, allowing users to opt
into a per-stage timing breakdown after the sync summary. Wire the flag
through main.rs into print_sync() which passes it to the new
should_print_timings() gate.

Enrich the data structures that flow through the sync pipeline so
downstream renderers have full error visibility:

- ProjectSummary gains status_errors (issue-side status enrichment
  failures per project)
- ProjectStatusEnrichment gains path (project path for sub-row display)
- SyncResult gains documents_errored and embedding_failed so the
  summary can surface doc-gen and embed failures separately
- Autocorrect table updated with --timings for fuzzy flag matching

src/main.rs

@@ -2099,7 +2099,7 @@ async fn handle_sync_cmd(
                     "{}",
                     Theme::warning().render("Interrupted by Ctrl+C. Partial results:")
                 );
-                print_sync(&result, elapsed, Some(metrics));
+                print_sync(&result, elapsed, Some(metrics), args.timings);
                 if released > 0 {
                     eprintln!(
                         "{}",
@@ -2122,7 +2122,7 @@ async fn handle_sync_cmd(
             if robot_mode {
                 print_sync_json(&result, elapsed.as_millis() as u64, Some(metrics));
             } else {
-                print_sync(&result, elapsed, Some(metrics));
+                print_sync(&result, elapsed, Some(metrics), args.timings);
             }
             Ok(())
         }