fix(android): preserve decoded values and duplicate class inventories

Parse Apktool YAML and XML at the producer boundary, preserving scalar spelling, XML text and partial string coverage. Retain repeated JADX inventory rows with explicit duplicate-name counts and lookup ambiguity. Make the Apktool verifier report cleanup failures.

Validation: parser, provider and JADX fixture boundary tests; typecheck, lint and documentation checks. Real Apktool and JADX engines were not exercised.

Refs #1978

docs/android-analysis.md

@@ -107,7 +107,11 @@ the same source byte limit and explicit truncation reporting.
   upstream engine and should be checked against the retained XML when needed.
   Signature verification is explicitly `not_performed`.
 - Class search consumes all pages and checks their counts. An empty `query`
-  inventories all class names; class names are decompiler representations.
+  inventories all class-name rows; class names are decompiler representations.
+  Repeated names remain repeated in `matches` so the inventory row count and
+  producer evidence stay visible. `duplicate_names` identifies matching names
+  with multiple rows and their occurrence counts; a name alone does not
+  distinguish which provider class node a later lookup selects.
 - Class inventories read parsed metadata without generating source and return
   full reported display types, fields and inner class names. Synthetic members
   that code generation hides can appear in the inventory; it stays consistent