add role-aware Epi assistant prompts Add verified June knowledge, guest/member/admin Copilot profiles, profile-isolated session recovery, animated Epi greetings, and a single authoritative runtime config workflow for inference. Co-authored-by: Copilot <[email protected]>

# config

Shared Bazel build configurations and platform definitions.

## Usage

Reference in BUILD files:

```starlark
load("//config:defs.bzl", ...)
```