fix(ab-connect): auto-reattach on cross-process detach (Rakuten SSO #19 follow-up)

v1.2.3's stable per-tab session id (#17) fixed sessionId STABILITY, but nothing
re-attached when an origin swaps the render process (e.g. the
login.account.rakuten.com SSO redirect — full-page nav + OOPIF). chrome.debugger
detached, the tab survived, but only onUpdated('complete') could re-attach — and
for that flow it didn't, so the session went permanently stale (even
open/navigate failed, retries didn't recover).

onDetach now proactively re-attaches the surviving tab (retry w/ backoff for the
swapped-in process to settle; skips user/DevTools-initiated detaches), so the
stable cb-tab-<tabId> session is restored and commands self-heal. Extension
0.4.4 → 0.4.5; needs a Web Store republish + dogfood on the Rakuten flow.

extensions/ab-connect/manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "chrome-use",
-  "version": "0.4.4",
+  "version": "0.4.5",
   "description": "Let chrome-use drive your logged-in Chrome \u2014 install once, no token, no per-use confirmation.",
   "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6vQIyscGIPYPZdSpPwPL0+0gxUROyRgCpmvCSDoc8XUm4qm97VbKnD9Ijc1lV22lNWZtE78gaRjt6BeSfuMgnBymnhLKjN1gU6AI5QUU0mrJyeHdWKvrKQR5FmsM2A7Xr1ykE2SiiS8zNUS3Y/6O5l+Nva7wrVy6E4a2dkBVQkOsu+DV+nEZvhIyuDY5D5SPXqNwUTWTaglwj5mjvHz36xSwCWlPmrtJ+ED0AUyrb2z4GIOmvk4kqtBVrh/UD058klLo4CkYOnIybB5aV6WYuwarfPY4bF/dLggPem+ewLNTUNBuwrxj/A4nUv0LJTuRO8rR7f8WR9qnRCY0Ic5saQIDAQAB",
   "icons": {