fix: all 4 archdoc issues — cycles, layout, integrations, usage examples

1. Module Cycles: properly format cycle paths as A → B → C → A
2. Repository layout: group by top-level directory with file counts
3. Integration detection: match patterns against import names (substring),
   add Storage and AI/ML categories to all templates and summary
4. Usage examples: extract __init__ required params for class constructors

Also fix golden test to use ends_with for module-prefixed symbol IDs.

test-project/ARCHITECTURE.md

@@ -46,9 +46,9 @@ No tooling information available.
 
 | Module | Symbols | Inbound | Outbound | Link |
 |--------|---------|---------|----------|------|
-| core | 6 | 0 | 0 | [details](docs/architecture/modules/core.md) |
 | utils | 4 | 0 | 0 | [details](docs/architecture/modules/utils.md) |
 | src | 0 | 0 | 0 | [details](docs/architecture/modules/src.md) |
+| core | 6 | 0 | 0 | [details](docs/architecture/modules/core.md) |
 <!-- ARCHDOC:END section=modules_index -->
 
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