feat: distribution package v1.0 — OCIR-based deployment without source code

- distribution/: public release package (docker-compose + terraform VM + README v1.0)
- docker-compose.yml pulls pre-built images from OCIR (no build, no source code)
- terraform/: VM stack (ARM Free Tier, LB+WAF+SSL, conditional DNS/Let's Encrypt)
- Removed terraform-oke/ and k8s/ from git (private, .gitignore)

.gitignore

@@ -39,5 +39,9 @@ dist/
 !*.tfvars.example
 .terraform.lock.hcl
 
+# Private deployment (OKE/K8s — not for public distribution)
+deploy/terraform-oke/
+deploy/k8s/
+
 # Project internal docs
 LESSONS_LEARNED.md