Add event-sourced wallet and transaction tracking system

Wallets table with 7 seeded wallets, events table for three transaction
types (bank_to_exchange, exchange_to_wallet, wallet_to_wallet). Balances
computed from event credits/debits in sats. REST endpoints for CRUD.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/clj/pmagnus/btcdata/web/routes/api.clj

@@ -4,6 +4,7 @@
    [integrant.core :as ig]
    [pmagnus.btcdata.frankfurter.rates :as rates]
    [pmagnus.btcdata.web.controllers.health :as health]
+   [pmagnus.btcdata.web.controllers.transactions :as tx]
    [pmagnus.btcdata.web.middleware.exception :as exception]
    [pmagnus.btcdata.web.middleware.formats :as formats]
    [reitit.coercion.malli :as malli]
@@ -161,7 +162,17 @@
    ["/strike/ws"
     {:get        (fn [req] (ws-strike-handler opts req))
      :no-doc     true
-     :middleware []}]])
+     :middleware []}]
+   ["/wallets"
+    {:get  (fn [req] (tx/list-wallets opts req))
+     :post (fn [req] (tx/create-wallet! opts req))}]
+   ["/wallets/balances"
+    {:get (fn [req] (tx/get-wallet-balances opts req))}]
+   ["/wallets/:id/events"
+    {:get (fn [req] (tx/get-wallet-events opts req))}]
+   ["/events"
+    {:get  (fn [req] (tx/list-events opts req))
+     :post (fn [req] (tx/create-event! opts req))}]])
 
 (defn route-data [opts]
   (merge