feat: initial implementation of content-addressed incremental backup engine

Rust-centric architecture with TypeScript facade following smartproxy/smartstorage pattern.
Core engine in Rust (FastCDC chunking, SHA-256, gzip, AES-256-GCM + Argon2id, binary pack files,
global index, snapshots, locking, verification, pruning, repair). TypeScript provides npm interface
via @push.rocks/smartrust RustBridge IPC with Unix socket streaming for ingest/restore.
All 14 integration tests pass.

package.json

@@ -0,0 +1,59 @@
+{
+  "name": "@push.rocks/containerarchive",
+  "version": "0.0.1",
+  "private": false,
+  "description": "content-addressed incremental backup engine with deduplication, encryption, and error correction",
+  "main": "dist_ts/index.js",
+  "typings": "dist_ts/index.d.ts",
+  "type": "module",
+  "scripts": {
+    "test": "(tstest test/ --verbose --timeout 60)",
+    "build": "(tsrust && tsbuild tsfolders --allowimplicitany)"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://code.foss.global/push.rocks/containerarchive.git"
+  },
+  "author": "Lossless GmbH",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://code.foss.global/push.rocks/containerarchive/issues"
+  },
+  "homepage": "https://code.foss.global/push.rocks/containerarchive",
+  "dependencies": {
+    "@push.rocks/lik": "^6.0.0",
+    "@push.rocks/smartpromise": "^4.0.0",
+    "@push.rocks/smartrust": "^1.3.2",
+    "@push.rocks/smartrx": "^3.0.0"
+  },
+  "devDependencies": {
+    "@git.zone/tsbuild": "^2.0.0",
+    "@git.zone/tsrun": "^1.0.0",
+    "@git.zone/tstest": "^1.0.0",
+    "@git.zone/tsrust": "^1.3.0",
+    "@types/node": "^22.0.0"
+  },
+  "files": [
+    "ts/**/*",
+    "dist/**/*",
+    "dist_*/**/*",
+    "dist_ts/**/*",
+    "assets/**/*",
+    "npmextra.json",
+    "readme.md"
+  ],
+  "browserslist": [
+    "last 1 chrome versions"
+  ],
+  "keywords": [
+    "backup",
+    "deduplication",
+    "content-addressed",
+    "incremental",
+    "archive",
+    "encryption",
+    "chunking",
+    "fastcdc",
+    "pack-files"
+  ]
+}