fix(version): make version programmatic by reading from deno.json

- Replace hardcoded version in 00_commitinfo_data.ts
- Now dynamically imports deno.json and reads version
- Version will auto-update when deno.json is changed
- Fixes version showing 3.1.2 instead of 4.0.0

test: add Docker test scripts for v3→v4 migration
- 01-setup-v3-container.sh: Creates systemd container with v3
- 02-test-v3-to-v4-migration.sh: Tests migration (now fixed)
- 03-cleanup.sh: Removes test container
- README.md: Complete documentation

Tested: Version now correctly shows 4.0.0

ts/00_commitinfo_data.ts

@@ -1,8 +1,10 @@
 /**
- * autocreated commitinfo by @push.rocks/commitinfo
+ * commitinfo - reads version from deno.json
  */
+import denoConfig from '../deno.json' with { type: 'json' };
+
 export const commitinfo = {
-  name: '@serve.zone/nupst',
-  version: '3.1.2',
-  description: 'Node.js UPS Shutdown Tool for SNMP-enabled UPS devices',
+  name: denoConfig.name,
+  version: denoConfig.version,
+  description: 'Deno-powered UPS monitoring tool for SNMP-enabled UPS devices',
 };