docs(milestone): complete v1.0-nova-platform (release v0.1.6)

---ci---
project: nova-platform
milestone: v1.0
status: complete
requirements:
  covered: [REQ-01,REQ-02,REQ-03,REQ-04,REQ-05,REQ-06,REQ-07,REQ-08,REQ-09,REQ-10,REQ-11,REQ-12,REQ-13,REQ-14,REQ-15,REQ-16,REQ-17,REQ-18,REQ-19,REQ-20,REQ-21,REQ-22,REQ-23,REQ-24,REQ-25,REQ-26,REQ-27,REQ-28,REQ-29,REQ-30,REQ-31,REQ-32,REQ-33,REQ-34,REQ-35,REQ-36,REQ-37,REQ-38]
  partial: []
---/ci---

v1.0 milestone complete: simplified infrastructure-delivery platform
derived from Nova (acdl). 6 phases (P0-P5 + P6 final). 38 REQ-IDs.
38 decisions (D-001..D-038). 76 tests pass. Engine boundary holds.
Happy paths green (check-only + CI). 13 L1 + 2 L2 modules. 5 terraform
roots. Shell reproducibility. Zero OOS files.

Tags: v0.1.0 (P0) → v0.1.1..v0.1.5 (P1..P5) → v0.1.6 (P6 = milestone
release on v0.1 patch line).

core/environments/dev.json

@@ -0,0 +1,14 @@
+{
+  "name": "dev",
+  "description": "Sample dev environment for offline/local testing. account_id placeholder (000000000000) for offline mode.",
+  "account_id": "000000000000",
+  "region": "us-east-1",
+  "state_backend": {
+    "bucket": "nova-tfstate-dev-us-east-1",
+    "lock_table": "nova-tfstate-locks"
+  },
+  "network": {
+    "vpc_cidr": "10.0.0.0/16",
+    "azs": ["us-east-1a", "us-east-1b"]
+  }
+}