feat(db): architecture zone-bias + color-register-band tables + V-TT-06/07 (T-988)

Ratified content baked into systems.db as two new tables:
- architecture_zone_bias (57 rows): sparse per-template, per-zone_type
  token-weight overrides (integer bps), Miri-authored — the D-235 step-2
  zone bias. V-TT-06: every token must exist in that template's own
  visual_bundle axis.
- color_register_bands (28 rows): per color_register integer HSV bands
  (hue centidegrees, sat/val bps), Araminta-authored. V-TT-07: full
  catalog coverage + valid integer bounds (min<max, in range).

Both TOMLs registered in generator_sources (stamp coverage); DDL in
systems-schema.sql + migration.py; validation wired into import_economics
steps 18/19 and test_traits.py failure-branch units (make test-tooling).
systems.db regenerated + re-stamped.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tooling/generator_sources.py

@@ -88,6 +88,17 @@ ARCHITECTURE_TRAIT_BIAS_TOML: Path = (
 OBJECT_TAG_VOCABULARY_TOML: Path = (
     REPO_ROOT / "wiki" / "economics" / "object_tag_vocabulary.toml"
 )
+# D-235 exterior-grammar content (T-988): per-(template, zone_type) axis-token
+# bias overrides, and per-color_register integer HSV sampling bands. Both are
+# baked alongside trait_templates (traits.py: populate_architecture_zone_bias,
+# populate_color_register_bands), so an edit to either must flip the stamp
+# exactly like the catalog/registry above.
+ARCHITECTURE_ZONE_BIAS_TOML: Path = (
+    REPO_ROOT / "wiki" / "economics" / "architecture_zone_bias.toml"
+)
+COLOR_REGISTER_BANDS_TOML: Path = (
+    REPO_ROOT / "wiki" / "economics" / "color_register_bands.toml"
+)
 
 
 def _economy_import_modules() -> tuple[Path, ...]:
@@ -124,6 +135,8 @@ IMPORT_ECONOMICS_SOURCES: tuple[Path, ...] = (
     ARCHITECTURE_TRAIT_CATALOG_TOML,
     ARCHITECTURE_TRAIT_BIAS_TOML,
     OBJECT_TAG_VOCABULARY_TOML,
+    ARCHITECTURE_ZONE_BIAS_TOML,
+    COLOR_REGISTER_BANDS_TOML,
 )
 
 # ---------------------------------------------------------------------------