feat: add hourly portfolio sync history

prisma/schema.prisma

@@ -17,6 +17,7 @@ model User {
   bankCardOperations BankCardOperation[]
   sessions        Session[]
   tbankConnection TbankConnection?
+  tbankValueHistory TbankPortfolioValueHistory[]
   createdAt       DateTime         @default(now())
   updatedAt       DateTime         @updatedAt
 }
@@ -69,6 +70,34 @@ model TbankPortfolio {
   @@id([userId, revision, accountId])
 }
 
+// Account valuation history survives connection replacement and stays hidden
+// until the current connection confirms the account again.
+model TbankPortfolioValueHistory {
+  userId String
+  accountId String
+  deletedAt DateTime?
+  updatedAt DateTime @updatedAt
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+  points TbankPortfolioValuePoint[]
+
+  @@id([userId, accountId])
+}
+
+// One row per currency of a fully valued successful portfolio attempt.
+model TbankPortfolioValuePoint {
+  userId String
+  accountId String
+  attemptId String
+  currency String
+  value String
+  capturedAt DateTime
+  createdAt DateTime @default(now())
+  history TbankPortfolioValueHistory @relation(fields: [userId, accountId], references: [userId, accountId], onDelete: Cascade, onUpdate: Restrict)
+
+  @@id([userId, accountId, attemptId, currency])
+  @@index([userId, accountId, capturedAt])
+}
+
 model TbankOperation {
   userId String
   revision String