docs: Enhance module documentation across various files for clarity a… (#62)

* docs: Enhance module documentation across various files for clarity and completeness

* fix: Remove unnecessary blank line in build.rs for cleaner code

* docs: Update documentation to improve clarity and consistency in code comments

src/constraint/domain.rs

@@ -322,7 +322,7 @@ impl BoolState {
 pub struct ValueFact {
     /// Exact known constant (Eq constraint). `None` = unconstrained.
     pub exact: Option<ConstValue>,
-    /// Excluded constant values (Neq constraints). Bounded by [`MAX_NEQ`].
+    /// Excluded constant values (Neq constraints). Bounded by `MAX_NEQ`.
     pub excluded: SmallVec<[ConstValue; 4]>,
     /// Inclusive lower bound (`None` = −∞).
     pub lo: Option<i64>,

src/constraint/lower.rs

@@ -204,7 +204,7 @@ pub fn lower_condition(
 /// Called during SSA lowering when the full [`SsaBody`] is not yet available.
 /// Resolves variables via `var_stacks[name].last()` (the current reaching
 /// definition) instead of scanning `value_defs`. Does not use `const_values`
-/// (unavailable at lowering time); constants are seeded into [`PathEnv`]
+/// (unavailable at lowering time); constants are seeded into [`crate::constraint::PathEnv`]
 /// separately via `seed_from_optimization`.
 pub fn lower_condition_with_stacks(
     cond_info: &NodeInfo,

src/constraint/solver.rs

@@ -200,7 +200,7 @@ fn apply_value_const(env: &mut PathEnv, v: crate::ssa::ir::SsaValue, op: CompOp,
 /// Resolution order:
 /// 1. Cross-language primitive aliases (case-insensitive)
 /// 2. Java/Ruby/Go class and framework names (case-sensitive)
-/// 3. Java type hierarchy fallback (case-sensitive, via [`TypeHierarchy`])
+/// 3. Java type hierarchy fallback (case-sensitive, via [`crate::ssa::type_facts::TypeHierarchy`])
 pub fn parse_type_name(name: &str) -> Option<TypeKind> {
     use crate::ssa::type_facts::TypeHierarchy;