fix(cli): resolve SQL directory at runtime for bundled CLI

The sqlDir() function was using __dirname which gets baked in at build
time by bundlers (bun/esbuild), causing prepare-db --print-sql to fail
when run from npm-installed package.

Changes:
- Use import.meta.url with fileURLToPath for runtime path resolution
- Copy SQL files to dist/sql during build
- Add CI smoke test to verify prepare-db --print-sql works

Author: claude

.gitlab-ci.yml

@@ -110,6 +110,8 @@ cli:node:smoke:
     - node ./cli/dist/bin/postgres-ai.js --help
     - node ./cli/dist/bin/postgres-ai.js mon status --help
     - node ./cli/dist/bin/postgres-ai.js mon targets list --help
+    # Verify prepare-db --print-sql works (SQL templates are bundled correctly)
+    - node ./cli/dist/bin/postgres-ai.js prepare-db --print-sql 2>&1 | grep -q "CREATE" || (echo "prepare-db --print-sql failed to output SQL" && exit 1)
     - npm install -g ./cli
     - echo "prefix=$(npm config get prefix)" && echo "PATH=$PATH"
     - command -v postgres-ai && postgres-ai --help

cli/lib/init.ts

@@ -1,5 +1,5 @@
 import { randomBytes } from "crypto";
-import { URL } from "url";
+import { URL, fileURLToPath } from "url";
 import type { ConnectionOptions as TlsConnectionOptions } from "tls";
 import type { Client as PgClient } from "pg";
 import * as fs from "fs";
@@ -163,9 +163,15 @@ function sqlDir(): string {
   // Handle both development and production paths
   // Development: lib/init.ts -> ../sql
   // Production (bundled): dist/bin/postgres-ai.js -> ../sql (copied during build)
+  //
+  // IMPORTANT: Use import.meta.url instead of __dirname because bundlers (bun/esbuild)
+  // bake in __dirname at build time, while import.meta.url resolves at runtime.
+  const currentFile = fileURLToPath(import.meta.url);
+  const currentDir = path.dirname(currentFile);
+
   const candidates = [
-    path.resolve(__dirname, "..", "sql"),       // bundled: dist/bin -> dist/sql
-    path.resolve(__dirname, "..", "..", "sql"), // dev from lib: lib -> ../sql
+    path.resolve(currentDir, "..", "sql"),       // bundled: dist/bin -> dist/sql
+    path.resolve(currentDir, "..", "..", "sql"), // dev from lib: lib -> ../sql
   ];
 
   for (const candidate of candidates) {

cli/package.json

@@ -26,7 +26,7 @@
   },
   "scripts": {
     "embed-metrics": "bun run scripts/embed-metrics.ts",
-    "build": "bun run embed-metrics && bun build ./bin/postgres-ai.ts --outdir ./dist/bin --target node && node -e \"const fs=require('fs');const f='./dist/bin/postgres-ai.js';fs.writeFileSync(f,fs.readFileSync(f,'utf8').replace('#!/usr/bin/env bun','#!/usr/bin/env node'))\"",
+    "build": "bun run embed-metrics && bun build ./bin/postgres-ai.ts --outdir ./dist/bin --target node && node -e \"const fs=require('fs');const f='./dist/bin/postgres-ai.js';fs.writeFileSync(f,fs.readFileSync(f,'utf8').replace('#!/usr/bin/env bun','#!/usr/bin/env node'))\" && cp -r ./sql ./dist/sql",
     "prepublishOnly": "npm run build",
     "start": "bun ./bin/postgres-ai.ts --help",
     "start:node": "node ./dist/bin/postgres-ai.js --help",