feat: v0.3.0 — standardize codebase, centralize infra, merge QR into CMS

- Enforce axum best practices across all 13 workspace crates
  (max 200 LOC/file, no comments, no unwrap, clean architecture)
- Fix domain→infrastructure dependency inversions in imphnen-iam and imphnen-dimentorin
- Extract imphnen-storage (MinIO) and imphnen-email (Lettre) as standalone crates
- Centralize all config in ENV struct: CDN_URL, CORS_ALLOWED_ORIGINS
- Centralize SMTP through imphnen-email; remove dead HackathonConfig
- Centralize database: QR crate now shares main DB pool (single DATABASE_URL)
- Rename QR users table to qr_users to avoid collision with main users table
- Merge imphnen-qr into imphnen-cms/src/qr (13 crates, down from 14)
- Restructure imphnen-hackathon flat modules into clean architecture
- Remove all stale env vars from .env.example (SurrealDB, QR_JWT, Hackathon infra)
- Fix Dockerfile to include all current workspace crates
- Bump all crate versions 0.2.0 → 0.3.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

imphnen-hackathon/src/admin/infrastructure/http/routes.rs

@@ -0,0 +1,40 @@
+use super::handlers::*;
+use crate::admin::application::admin_service::AdminServiceImpl;
+use crate::admin::domain::service::AdminService;
+use crate::admin::infrastructure::persistence::PostgresAdminRepository;
+use crate::middleware::{
+	admin_only::admin_only, hackathon_auth::hackathon_auth_middleware,
+};
+use axum::{
+	Extension, Router,
+	middleware::from_fn,
+	routing::{delete, get, post},
+};
+use sqlx::PgPool;
+use std::sync::Arc;
+
+pub fn hackathon_admin_routes(pool: Arc<PgPool>) -> Router {
+	let service: Arc<dyn AdminService> = Arc::new(AdminServiceImpl::new(Arc::new(
+		PostgresAdminRepository::new(pool.clone()),
+	)));
+	Router::new()
+		.route("/admin/users", get(admin_list_users))
+		.route(
+			"/admin/users/:user_id",
+			get(admin_get_user).delete(admin_delete_user),
+		)
+		.route("/admin/users/:user_id/set-admin", post(admin_set_admin))
+		.route("/admin/teams", get(admin_list_teams))
+		.route("/admin/teams/:team_id", delete(admin_delete_team))
+		.route("/admin/submissions", get(admin_list_submissions))
+		.route(
+			"/admin/winners",
+			get(admin_list_winners).post(admin_set_winner),
+		)
+		.route("/admin/winners/:team_id", delete(admin_remove_winner))
+		.layer(Extension(service))
+		.layer(Extension(pool.clone()))
+		.layer(from_fn(admin_only))
+		.layer(Extension(pool))
+		.layer(from_fn(hackathon_auth_middleware))
+}