feat(tahuantinsuyu): scaffolding del estudio astrológico (10 crates + ventana 3-panes)

Módulo nuevo `modules/tahuantinsuyu/` con 9 crates reusables + app
`apps/tahuantinsuyu` ejecutable que abre la ventana del explorador y
coordina los widgets:

- tahuantinsuyu-card: Card Brahman + spawn_sidecar (flows
  chart-request/chart-result).
- tahuantinsuyu-model: tipos agnósticos (Group/Contact/Chart,
  StoredBirthData, StoredChartConfig, ChartKind, TreeSelection).
- tahuantinsuyu-store: persistencia SQLite (rusqlite) con migración v1,
  CRUD por entidad y descenso recursivo `charts_under_group`.
- tahuantinsuyu-engine: bridge agnóstico al canvas vía `RenderModel`
  (Layer/Glyph/Geometry). Feature `eternal-bridge` (off por default)
  reservada para enchufar eternal-astrology desde ~/eternal.
- tahuantinsuyu-modules: registry de módulos pluggables (Module trait
  + Control schema) con `NatalModule` placeholder.
- tahuantinsuyu-theme: AstroPalette (elementos / modos / planetas /
  aspectos) con variantes dark + light sobre yahweh-theme.
- tahuantinsuyu-canvas: widget GPUI con CanvasState (Empty / Wheel /
  Thumbnails). Render placeholder hasta cablear la rueda real.
- tahuantinsuyu-tree: explorador izquierdo sobre yahweh-widget-tree,
  prefijos g:/c:/h: para Group/Contact/Chart.
- tahuantinsuyu-panel: control panel inferior que lee Controls de los
  módulos del registry y los pinta.
- apps/tahuantinsuyu: binario `tahuantinsuyu` (launch_app-style) con
  Shell coordinador (tree↔canvas↔panel), DB en $XDG_DATA_HOME.

Workspace Cargo.toml actualizado con los 10 miembros. `cargo check`
verde, tests unitarios verdes (model/store/engine/modules/theme/card).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Cargo.toml

@@ -133,6 +133,19 @@ members = [
     # ============================================================
     "crates/modules/barra/barra-web",
 
+    # ============================================================
+    # modules/tahuantinsuyu/ — estudio de astrología profesional
+    # ============================================================
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-card",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-model",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-store",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-engine",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-modules",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-theme",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-canvas",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-tree",
+    "crates/modules/tahuantinsuyu/tahuantinsuyu-panel",
+
     # ============================================================
     # apps/ — apps que consumen el protocolo (yahweh modules+shell)
     # ============================================================
@@ -156,6 +169,7 @@ members = [
     "crates/apps/lapaloma-stream-demo",
     "crates/apps/lapaloma-phosphor-demo",
     "crates/apps/lapaloma-financial-demo",
+    "crates/apps/tahuantinsuyu",
 ]
 
 [workspace.package]