release: v0.8.2 — extension vault-creation fix (binary transport)

Extension-only patch: fixes vault create/attach in the browser extension, where
chrome.runtime.sendMessage silently dropped ArrayBuffer payloads (carrier JPEG →
0 bytes → opaque "no SOF marker found in JPEG"). See CHANGELOG for the full set.

- Version bumps: extension 0.7.0→0.8.2 (it had no changes in 0.8.0/0.8.1);
  relicario-core/-cli/-wasm 0.8.1→0.8.2 for unified-tag consistency. The Rust
  core/CLI are functionally unchanged from v0.8.1. relicario-server stays 0.1.1
  (independent version line; no functional change).
- CHANGELOG.md: v0.8.2 section. STATUS.md / ROADMAP.md: v0.8.2 landed, v0.9.0
  flagged as ready to kick off.

Verify: cargo build/test/clippy -D warnings all green (35 test binaries);
extension 435/435 vitest, build:all clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Pe8qw5KePDqAEBsAxnVQuJ

extension/manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Relicario",
-  "version": "0.7.0",
+  "version": "0.8.2",
   "description": "Two-factor encrypted password manager",
   "icons": {
     "16": "icons/icon-16.png",

extension/package.json

@@ -1,6 +1,6 @@
 {
   "name": "relicario-extension",
-  "version": "0.7.0",
+  "version": "0.8.2",
   "private": true,
   "scripts": {
     "build": "webpack --mode production",