* docs: update aws profile specified in script (local renaming)
* ci: add least-privilege permissions blocks to workflow callers
Resolves code scanning alerts #3 and #4 (actions/missing-workflow-permissions). Both callable workflows only need contents: read; the dependency-review callable already declares it internally, this caps the caller token to match."
* chore(deps): bump aws-cdk-lib to 2.262.0 for patched brace-expansion
Resolves Dependabot alert #4 (CVE-2026-13149, exponential-time DoS in brace-expansion expand()). The vulnerable 5.0.6 is a bundled dependency inside the aws-cdk-lib tarball, so it cannot be updated independently; 2.262.0 bundles the patched 5.0.7.
Also migrates Stack#addDependency to addStackDependency (deprecated in this release) in bin/app.ts.
README: document AWS Backup phase-2 (phase2-offsite-everything selection),
remove retired database-1 from phase-1 scope (audit H-19), update roadmap +
verify smoke-test to a live resource.
scripts/iam-user-delete.sh: reusable full IAM user teardown (keys, policies,
groups, MFA, login profile, certs, SSH keys, service creds, then user) with
--profile/--yes and a guard against deleting the caller's own identity. Built
from the Day 4 audit IAM cleanup.
