maude: load-order.txt single-source manifest (driver-level facade; .sx facade proven infeasible)

load is an epoch command not an evaluator symbol, so an .sx file can't wrap the
load list. Extract the dependency-ordered file list to lib/maude/load-order.txt;
conformance.conf reads it via mapfile. 274/274 green. lib/artdag can source the
same file to drop its duplicated load lines.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/maude/conformance.conf

@@ -3,24 +3,10 @@
 LANG_NAME=maude
 MODE=dict
 
-PRELOADS=(
-  lib/guest/lex.sx
-  lib/guest/pratt.sx
-  lib/maude/term.sx
-  lib/maude/parser.sx
-  lib/maude/sorts.sx
-  lib/maude/reduce.sx
-  lib/maude/matching.sx
-  lib/maude/conditional.sx
-  lib/maude/fire.sx
-  lib/maude/confluence.sx
-  lib/maude/rewrite.sx
-  lib/maude/searchpath.sx
-  lib/maude/strategy.sx
-  lib/maude/meta.sx
-  lib/maude/pretty.sx
-  lib/maude/run.sx
-)
+# Load order is the single source of truth in load-order.txt (also consumable
+# by other drivers, e.g. lib/artdag). Sourced after the driver cd's to repo
+# top-level, so the relative path resolves; #-comments and blanks are stripped.
+mapfile -t PRELOADS < <(grep -vE '^[[:space:]]*(#|$)' lib/maude/load-order.txt)
 
 SUITES=(
   "parse:lib/maude/tests/parse.sx:(mau-parse-tests-run!)"