refactor: Use cj/log-silently for debug messages

Converted debug/informational messages to use cj/log-silently instead of
message across multiple modules. These are automatic initialization or
background task messages that don't need minibuffer display but should
still be logged to *Messages* buffer.

Changes:
- org-agenda-config.el: Cache build/hit messages (4 messages)
- org-refile-config.el: Cache build/hit + mode switching (5 messages)
- org-export-config.el: reveal.js download message (1 message)
- auth-config.el: oauth2-auto cache fix message (1 message)
- quick-video-capture.el: initialization message (1 message)

All modules now require system-lib for cj/log-silently function.
Keeps UI clean while maintaining debuggability.

1 files changed, 3 insertions, 1 deletions

diff --git a/modules/quick-video-capture.el b/modules/quick-video-capture.el
index 100cf04af..4e62309ea 100644
--- a/modules/quick-video-capture.el
+++ b/modules/quick-video-capture.el
@@ -20,6 +20,8 @@
 
 ;;; Code:
 
+(require 'system-lib)
+
 ;; Declare external functions to avoid warnings
 (declare-function org-capture "org-capture" (&optional goto keys))
 (declare-function org-protocol-check-filename-for-protocol "org-protocol" (fname restoffiles client))
@@ -99,7 +101,7 @@ It's designed to be idempotent - safe to call multiple times."
                      :jump-to-captured nil)))
     
     (setq cj/video-download-initialized t)
-    (message "Video download functionality initialized")))
+    (cj/log-silently "Video download functionality initialized")))
 
 (defun cj/video-download-bookmarklet-instructions ()
   "Display instructions for setting up the browser bookmarklet."