chore: upgrade @ocas/* to ^0.3.0, migrate better-sqlite3 → node:sqlite

- @ocas/core and @ocas/fs upgraded from ^0.2.2 to ^0.3.0
- agent-hermes: replace better-sqlite3 with node:sqlite (DatabaseSync)
- Remove better-sqlite3 and @types/better-sqlite3 dependencies
- Fix remaining bun references in cli test helpers (execFileSync)

Refs #28

packages/cli/package.json

@@ -11,8 +11,8 @@
     "uwf": "./dist/cli.js"
   },
   "dependencies": {
-    "@ocas/core": "^0.2.2",
-    "@ocas/fs": "^0.2.2",
+    "@ocas/core": "^0.3.0",
+    "@ocas/fs": "^0.3.0",
     "@united-workforce/protocol": "workspace:^",
     "@united-workforce/util": "workspace:^",
     "@united-workforce/util-agent": "workspace:^",

packages/cli/src/__tests__/prompt.test.ts

@@ -89,7 +89,7 @@ describe("prompt commands", () => {
   });
 
   test("prompt help subcommand is suppressed", () => {
-    const output = execFileSync("bun", ["src/cli.ts", "prompt", "--help"], {
+    const output = execFileSync("npx", ["tsx", "src/cli.ts", "prompt", "--help"], {
       cwd: join(__dirname, "..", ".."),
       encoding: "utf-8",
       env: { ...process.env, PATH: `/opt/homebrew/bin:${process.env.PATH}` },

packages/cli/src/__tests__/thread-step-count.test.ts

@@ -8,7 +8,7 @@ const CLI_PATH = join(dirname(fileURLToPath(import.meta.url)), "..", "cli.js");
 
 function runCli(args: string[]): { stdout: string; stderr: string; exitCode: number } {
   try {
-    const stdout = execFileSync("bun", ["run", CLI_PATH, ...args], {
+    const stdout = execFileSync("npx", ["tsx", CLI_PATH, ...args], {
       encoding: "utf8",
       env: { ...process.env, WORKFLOW_STORAGE_ROOT: "/tmp/uwf-test-nonexistent" },
       stdio: ["ignore", "pipe", "pipe"],