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-cms/src/qr/users/application/mod.rs

@@ -0,0 +1 @@
+pub mod user_service;

imphnen-cms/src/qr/users/application/user_service.rs

@@ -0,0 +1,62 @@
+use async_trait::async_trait;
+use imphnen_utils::errors::AppError;
+use std::sync::Arc;
+use uuid::Uuid;
+
+use crate::qr::users::domain::{
+	entity::{UpdateUserInput, UserEntity},
+	repository::UserRepository,
+	service::QrUserService,
+};
+
+pub struct QrUserServiceImpl {
+	repo: Arc<dyn UserRepository>,
+}
+
+impl QrUserServiceImpl {
+	pub fn new(repo: Arc<dyn UserRepository>) -> Self {
+		Self { repo }
+	}
+}
+
+#[async_trait]
+impl QrUserService for QrUserServiceImpl {
+	async fn get_profile(&self, user_id: Uuid) -> Result<UserEntity, AppError> {
+		self
+			.repo
+			.find_by_id(user_id)
+			.await?
+			.ok_or_else(|| AppError::NotFoundError("User not found".to_string()))
+	}
+
+	async fn update_profile(
+		&self,
+		user_id: Uuid,
+		input: UpdateUserInput,
+	) -> Result<UserEntity, AppError> {
+		if let Some(ref email) = input.email
+			&& email.trim().is_empty()
+		{
+			return Err(AppError::ValidationError(
+				"Email cannot be empty".to_string(),
+			));
+		}
+		self.repo.update(user_id, input).await
+	}
+
+	async fn list_all(&self) -> Result<Vec<UserEntity>, AppError> {
+		self.repo.find_all().await
+	}
+
+	async fn update_role(
+		&self,
+		id: Uuid,
+		role: String,
+	) -> Result<UserEntity, AppError> {
+		self.repo.update_role(id, role).await
+	}
+
+	async fn delete(&self, id: Uuid) -> Result<(), AppError> {
+		self.repo.delete(id).await
+	}
+}