docs(load-graph): classify core libraries and command modules

Third classification batch: the remaining core and library command modules from init.el's early block — external-open, media-utils, auth-config, keyboard-macros, system-utils, text-config, undead-buffers. I annotated each with the load-graph header contract, added a Batch 3 table to the inventory, and extended the validation allowlist. 23 of 102 modules are now classified.

No new hidden dependencies in this batch. auth-config stays eager because other modules need credentials early; the command libraries (external-open, media-utils, keyboard-macros) are eager only by init order and flagged as Phase 4 deferral candidates.

1 files changed, 9 insertions, 0 deletions

diff --git a/modules/text-config.el b/modules/text-config.el
index 4e9208bc..5a946d52 100644
--- a/modules/text-config.el
+++ b/modules/text-config.el
@@ -3,6 +3,15 @@
 
 ;;; Commentary:
 ;;
+;; Layer: 2 (Core UX).
+;; Category: C/P.
+;; Load shape: eager.
+;; Eager reason: general text-editing defaults and mode hooks the first session
+;;   relies on.
+;; Top-level side effects: three add-hook plus use-package package configuration.
+;; Runtime requires: none (configures packages via use-package).
+;; Direct test load: yes.
+;;
 ;; Configuration for text editing features including:
 ;; - Basic text mode settings (visual line mode, indentation, spacing)
 ;; - Text manipulation (move-text, expand-region, change-inner)