Release 0.2.22: capital chart, Investor View, GP stakes, doc folders

Snapshot commit bringing the uncommitted phase-2 work into version control
together with four new features and the 0.2.22 version bump.

New features:
- Investor capital-over-time chart (value, paid-in, distributions per
  quarter), rendered from existing capital-account history.
- Admin Investor View: read-only reconstruction of an investor's portal
  (GET /api/users/{id}/investor-view), reusing the investor portal UI.
- Document upload scoped to the selected fund's own investors, with an
  explicit upload-target confirmation to prevent mis-attaching.
- GP/mgmt entities gain an Assets tab listing their stakes in the funds
  they manage (new entity_stakes table + /api/entities/{id}/stakes).
- Edit-entity form (change type/status/etc.), so GP entities can be
  categorized correctly.

Verified: 11/11 backend tests pass; alembic upgrades to head b8c9d0e1f2a3;
frontend tsc + vite build clean; s9pk packs at 0.2.22:0 (x86_64).
Also: ignore .DS_Store and *.s9pk artifacts.

backend/ten31portal/routers/position_router.py

@@ -6,7 +6,7 @@ from fastapi import APIRouter, Depends, HTTPException
 from sqlmodel import Session, select
 
 from ten31portal.audit import record_audit
-from ten31portal.auth import get_current_user, require_writer
+from ten31portal.auth import require_internal, require_writer
 from ten31portal.database import get_session
 from ten31portal.models import Holding, Position, Valuation, ValuationRound, RoundStatus, User
 from ten31portal.schemas import PositionCreate, PositionResponse, PositionUpdate
@@ -22,7 +22,7 @@ def _dollars_to_cents(dollars: float) -> int:
 @router.get("/api/holdings/{holding_id}/positions")
 def list_positions(
     holding_id: int,
-    user: User = Depends(get_current_user),
+    user: User = Depends(require_internal),
     session: Session = Depends(get_session),
 ) -> list[PositionResponse]:
     holding = session.get(Holding, holding_id)