fix(build): shrink published package from ~202 MB to ~3.5 MB (PER-15197)

v2.7.5's hybrid tsup build shipped the entire per-file build/ tree —
every internal module bundled with the OpenAPI client inlined, in both
CJS and ESM, plus a .map for every file (708 maps, 77 MB) and the test
specs. Result: ~202 MB published, breaking AWS Lambda's code-size limit.

The published artifact only needs the self-contained build/index.js /
build/index.mjs bundles (0 relative imports; axios/lodash/pino/url-parse
externalized) plus type declarations. The per-file outputs exist solely
so the test suite can import internal modules by relative path, so they
must keep being built — but they don't need to be published.

- package.json files: publish only build/index.{js,mjs} + build/**/*.d.ts
  (exclude per-file JS, all maps, and tests) instead of the whole build/
- tsup.config.ts: sourcemap false (maps are unused by tests, never shipped)

Verified via npm pack: 202 MB -> 3.5 MB unpacked (195 KB packed), 0 maps,
0 test files. CJS + ESM consume tests pass; module-import suite passes 6/6.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: dshoen619

package.json

@@ -100,9 +100,10 @@
     "typescript": "^4.6.4"
   },
   "files": [
-    "build",
-    "!**/*.spec.*",
-    "!**/*.json",
+    "build/**/*.d.ts",
+    "build/index.js",
+    "build/index.mjs",
+    "!build/tests/**",
     "CHANGELOG.md",
     "LICENSE",
     "README.md"

tsup.config.ts

@@ -5,7 +5,12 @@ export default defineConfig({
   format: ['cjs', 'esm'],
   dts: false,
   splitting: false,
-  sourcemap: true,
+  // Source maps are intentionally not emitted: they are not used by the test
+  // suite and previously shipped ~77 MB of .map files in the published package
+  // (see PER-15197). The published artifact is the self-contained build/index.*
+  // bundle only; per-file outputs below exist solely so the test suite can
+  // import internal modules by relative path.
+  sourcemap: false,
   clean: true,
   outDir: 'build',
   target: 'node16',