fix(update): proper require path fixes + license-keygen restore for v1.14.4 compatibility

v1.14.4 (commit d2a48b1) shipped with broken relative paths and missing
license-keygen.js module. This commit:

- server.js: 26 '../src/...' requires rewritten to './src/...' (server is
  at API root, must use ./src for files in src/)
- src/managers/license-manager.js: './license-keygen' rewritten to
  '../../license-keygen' (license-keygen.js lives at API root)
- src/docker/self-updater.js: './platform-paths' rewritten to
  '../../platform-paths' (platform-paths.js lives at API root)
- license-keygen.js: restored to root (was missing from v1.14.4 tarball)
- VERSION: bumped to d2a48b1-patched (matches upstream commit but with
  our fixes baked in)

Makes the v1.14.4 source buildable and runnable without external patches.
Companion to scripts/dashcaddy-post-deploy-patches.sh which applies these
fixes automatically during the host-side update flow.

dashcaddy-api/src/managers/license-manager.js

@@ -14,7 +14,7 @@ const crypto = require('crypto');
 const os = require('os');
 const fs = require('fs');
 const path = require('path');
-const { verifyCode, parseCode, VALID_DURATIONS } = require('./license-keygen');
+const { verifyCode, parseCode, VALID_DURATIONS } = require('../../license-keygen');
 const { errorResponse } = require('../utils/responses');
 
 const LICENSE_CRED_KEY = 'license.activation';