feat(cli): add verbose logging option for CLI commands

* Introduced a new flag `--verbose` to enable detailed logging.
* Implemented logging for connection events in SSE and stdio commands.
* Added a utility function to handle verbose logging.

internal/tools/backfill.go

@@ -55,24 +55,41 @@ func NewBackfillTool(db *store.DB, embeddings *ai.EmbeddingRunner, sessions *ses
 // It is used by capture when the embedding provider is temporarily unavailable.
 func (t *BackfillTool) QueueThought(ctx context.Context, id uuid.UUID, content string) {
 	go func() {
+		started := time.Now()
+		t.logger.Info("background embedding started",
+			slog.String("thought_id", id.String()),
+			slog.String("provider", t.embeddings.PrimaryProvider()),
+			slog.String("model", t.embeddings.PrimaryModel()),
+		)
+
 		result, err := t.embeddings.Embed(ctx, content)
 		if err != nil {
-			t.logger.Warn("background embedding retry failed",
+			t.logger.Warn("background embedding error",
 				slog.String("thought_id", id.String()),
+				slog.String("provider", t.embeddings.PrimaryProvider()),
+				slog.String("model", t.embeddings.PrimaryModel()),
+				slog.String("stage", "embed"),
+				slog.Duration("duration", time.Since(started)),
 				slog.String("error", err.Error()),
 			)
 			return
 		}
 		if err := t.store.UpsertEmbedding(ctx, id, result.Model, result.Vector); err != nil {
-			t.logger.Warn("background embedding upsert failed",
+			t.logger.Warn("background embedding error",
 				slog.String("thought_id", id.String()),
+				slog.String("provider", t.embeddings.PrimaryProvider()),
+				slog.String("model", result.Model),
+				slog.String("stage", "upsert"),
+				slog.Duration("duration", time.Since(started)),
 				slog.String("error", err.Error()),
 			)
 			return
 		}
-		t.logger.Info("background embedding retry succeeded",
+		t.logger.Info("background embedding complete",
 			slog.String("thought_id", id.String()),
+			slog.String("provider", t.embeddings.PrimaryProvider()),
 			slog.String("model", result.Model),
+			slog.Duration("duration", time.Since(started)),
 		)
 	}()
 }