init: archlens — architecture diagram generator

Hex arch + DDD, tree-sitter parsing, Mermaid/ASCII output.
Supports Rust + Python. 92 tests. CI, diff, --check for staleness detection.

crates/domain/src/value_objects/source/module_name.rs

@@ -0,0 +1,18 @@
+use crate::DomainError;
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ModuleName(String);
+
+impl ModuleName {
+    pub fn new(value: &str) -> Result<Self, DomainError> {
+        let trimmed = value.trim();
+        if trimmed.is_empty() {
+            return Err(DomainError::EmptyValue("ModuleName"));
+        }
+        Ok(Self(trimmed.to_string()))
+    }
+
+    pub fn as_str(&self) -> &str {
+        &self.0
+    }
+}