refactor: split auto-rules into modpack/ vs curated/ provenance subdirs

The previous flat data/rules/ flattened a real distinction:
  - data/rules/modpack/  mirrors of upstream modpack-author-bundled
                         sorting_rules.txt (HellDrinx). Update when
                         upstream publishes; don't unilaterally edit.
  - data/rules/curated/  sortof-operator-authored rules for individual
                         mods whose authors didn't declare load order
                         in their mod.info (RV Interior Expansion).

The loader stays provenance-agnostic; trigger values in _RULES_TRIGGERS
are paths relative to data/rules/ ("modpack/helldrinx.txt" etc.).
File headers in each rules file declare the provenance category and
edit policy.

api/app.py

@@ -338,21 +338,25 @@ MANUAL_BUILD_PAIRS: Dict[str, str] = {
 # parse_sorting_rules runs. User-supplied rules come last so they override
 # auto-injected defaults on conflicting keys.
 #
-# Use cases vary — modpacks (HellDrinx) shipping their own load order,
+# Provenance is encoded in the subdirectory:
-# individual mods (RV Interior Expansion) whose authors didn't declare
+#   data/rules/modpack/  — mirrors of upstream modpack-author-bundled rules
-# loadAfter in mod.info, or any other wsid whose presence implies a
+#                          (HellDrinx etc.). Update when upstream changes.
-# specific sort constraint. The mechanism is generic; each rules file
+#   data/rules/curated/  — sortof-operator-authored rules for individual
-# describes its own scope in its header.
+#                          mods whose authors didn't declare load order
+#                          in their mod.info (RV Interior Expansion etc.).
+#
+# The loader is provenance-agnostic; trigger values are paths relative to
+# data/rules/.
 _RULES_DIR = Path(__file__).resolve().parent.parent / "data" / "rules"
 _RULES_TRIGGERS: Dict[str, str] = {
-    # HellDrinx FULL + LITE both bundle the same sorting rules.
+    # HellDrinx FULL + LITE share one upstream-mirrored modpack rules file.
-    "3672556207": "helldrinx.txt",  # HellDrinx FULL
+    "3672556207": "modpack/helldrinx.txt",   # HellDrinx FULL
-    "3662909244": "helldrinx.txt",  # HellDrinx LITE
+    "3662909244": "modpack/helldrinx.txt",   # HellDrinx LITE
-    # RVInteriorExpansion + Part2 chain after PROJECTRVInterior42.
+    # RVInteriorExpansion + Part2 chain after PROJECTRVInterior42 — sortof
-    # Expansion authors didn't declare loadAfter in their mod.info; without
+    # operator-curated; expansion authors didn't declare loadAfter in
-    # these rules sortof has no signal to chain the cluster.
+    # their mod.info, so sortof has no other signal to chain the cluster.
-    "3618427553": "rv_expansion.txt",  # RVInteriorExpansion (rvupdate)
+    "3618427553": "curated/rv_expansion.txt",  # RVInteriorExpansion (rvupdate)
-    "3622163276": "rv_expansion.txt",  # RVInteriorExpansionPart2 (rv2)
+    "3622163276": "curated/rv_expansion.txt",  # RVInteriorExpansionPart2 (rv2)
 }
 # Human-readable trigger labels for the warning message.
 _RULES_LABELS: Dict[str, str] = {

data/rules/curated/rv_expansion.txt

@@ -1,4 +1,7 @@
-; RV Interior Expansion (B42) — sorting rules
+; RV Interior Expansion (B42) — sortof-operator-curated sorting rules.
+; Provenance: data/rules/curated/. Edit freely when authoring new
+; load-order constraints for mods whose authors didn't declare them.
+;
 ; Triggers:
 ;   - 3618427553 (RVInteriorExpansion, map folder rvupdate)
 ;   - 3622163276 (RVInteriorExpansionPart2, map folder rv2)

data/rules/modpack/helldrinx.txt

@@ -1,11 +1,11 @@
-; HellDrinx modpack — bundled sorting rules
+; HellDrinx — modpack-author-bundled sorting rules (mirror of upstream).
+; Provenance: data/rules/modpack/. Update when the modpack publishes a
+; new sorting_rules.txt; do not edit unilaterally.
+;
 ; Triggers: HellDrinx FULL (3672556207), HellDrinx LITE (3662909244).
 ; Auto-injected by app.py:_auto_rules_for() when either trigger wsid is in
 ; the user's input. User-supplied rules are appended afterward and override
 ; these on conflicting keys.
-;
-; Source: HellDrinx FULL/LITE — keep this file in sync with the modpack's
-; upstream sorting_rules.txt when it updates.
 
 [PROJECTRVInterior42]
 loadFirst=on