chore(deps): update all dependencies to latest

[bryantbiggs]

Bumps everything to latest across the Cargo workspace, the GitHub Actions pins, and the Terraform examples. No new majors were available in the Cargo tree.

• aws-config 1.8 → 1.10
• aws-sdk-autoscaling 1.116 → 1.123
• aws-sdk-ec2 1.227 → 1.241
• aws-sdk-eks 1.131 → 1.139
• aws-sdk-servicequotas 1.101 → 1.106
• clap_complete 4.5 → 4.6
• kube 4.0 → 4.2
• rust-embed 8.11 → 8.12
• tokio 1.52 → 1.53
• actions/checkout v7.0.0 → v7.0.1
• actions/setup-python v6.3.0 → v7.0.0
• softprops/action-gh-release v3.0.1 → v3.0.2
• dtolnay/rust-toolchain master SHA refreshed to 2c7215f
• terraform-aws-modules/eks ~> 21.14 → ~> 21.24
• hashicorp/aws provider >= 6.28 → >= 6.55
• gavinbunney/kubectl provider ~> 1.14 → ~> 1.19

clap_complete 4.6 changed the fish generator to emit space indentation, so completions/eksup.fish was regenerated via cargo xtask generate-all; the other completions and the man page are unchanged. setup-python v7 drops the pip-install input, which the docs workflow does not use. Cargo.lock was deleted and regenerated from scratch. All four Terraform examples init and validate against the bumped constraints.

Manual review — these have version-like values but are operator decisions, left untouched:

• kubernetes_version pinned via local.minor_version = 34 in examples/eks-managed/main.tf:10, examples/fargate-profile/main.tf:22, examples/mixed/main.tf:22, examples/self-managed/main.tf:10

Supersedes #174, #176, #177.