Add explicit path import traversal

docs/internal/overview.md

@@ -20,18 +20,18 @@ module and package documentation boundary. Its implemented public primitives are
 - strict schema-driven decoding over detached defaults in `decode.go`, including
   mapping/sequence semantics, null and numeric policy, safe codec errors, presence,
   baseline/final trees, and initial default/input origins; and
-- public single-source lifecycle coordination in `load.go`, version-report contexts
-  in `validation.go`, and detached base/default metadata assembly in
-  `load_metadata.go`; and
+- public lifecycle coordination in `load.go`, bounded canonical path-import DFS in
+  `imports.go`, version-report contexts in `validation.go`, and detached
+  base/default metadata assembly in `load_metadata.go`; and
 - recorded application defaulting and normalization in `resolution.go`, including
   explicitness queries, helper verification, structural mutation audit, coalesced
   intent, private before/after snapshots, and resolution metadata integration; and
 - post-resolution schema-aware report collection and validator mutation detection in
-  `validation.go`, completing the public single-source callback lifecycle.
+  `validation.go`, completing the public callback lifecycle after composed input.
 
 The [configuration contract](../config.md) owns implemented input, schema, decoding,
-single-source lifecycle, version checking, recorded resolution, semantic validation,
-metadata, and ownership behavior.
+loading lifecycle, path imports, composition, version checking, recorded resolution,
+semantic validation, metadata, and ownership behavior.
 
 The source-extraction inventory records the application foundations assigned to
 future implementation work: