0.2.44: bitcoin terms value paid-in capital call by call

The LP portal's 'In bitcoin terms' box converted ALL paid-in capital at
the fund close date's BTC price, mispricing every mid-life capital call.
It now walks the statement history: the first statement's contributions
at the close-date entry mark, each later quarter's new contributions at
that statement date's price, and distributions at the price when
received. A dollar called later is no longer credited with bitcoin it
could never have bought. Funds with a single statement (and files
predating the uploaded price range) fall back to the close-date price.
Frontend only; shared by the LP portal and the admin Investor View.

frontend/src/version.ts

@@ -1,4 +1,4 @@
 // Bumped each release so the running build is visible in the UI.
 // If the number shown in the app doesn't match the installed s9pk version,
 // the new frontend isn't actually being served.
-export const APP_VERSION = "0.2.43";
+export const APP_VERSION = "0.2.44";