ci(fleet): use shared AIO workflows

[JSONbored]

Summary

• Converts this repository to the shared AIO fleet workflows.

What changed

• Replaces duplicated build, upstream-check, and release workflow logic with pinned aio-fleet reusable workflows
• Keeps repo-specific inputs in small local caller workflows

Why

• Centralizes CI, publish gates, upstream monitoring, release preparation, Docker cache behavior, and catalog sync behavior across the AIO fleet

Validation

• Generated from JSONbored/aio-fleet manifest