slice 1a-1d: DB + CacheRepository + YFinance adapter + AdapterQueue

Node 26 + node:sqlite backend (zero native deps; runtime glue adapted from
Bun-spec design, deep-module architecture unchanged). 29 tests green across
schema/CacheRepository/YFinance-parse/AdapterQueue-dedupe.

app/server/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "investor-flow-server",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "engines": {
+    "node": ">=22"
+  },
+  "description": "Investor Flow — Bun/SQLite backend (implemented on Node 26 + node:sqlite; DESIGN.md §1-§8). Runtime glue adapted from Bun; deep-module architecture unchanged.",
+  "scripts": {
+    "dev": "node --watch --experimental-strip-types src/index.ts",
+    "start": "node --experimental-strip-types src/index.ts",
+    "test": "node --test --experimental-strip-types \"src/**/*.test.ts\"",
+    "db:init": "node --experimental-strip-types src/db/client.ts",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@trpc/server": "^11.0.0",
+    "yahoo-finance2": "^3.15.3"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "typescript": "^5.0.0"
+  }
+}