chore(analysis): update dependency analysis artifacts
Authored by: Structural Analysis Agent (Euler)
Updated all dependency analysis artifacts with fresh extraction:
- graph.json: Canonical dependency graph with 10 crates, 139 files, 16 crate edges, 72 file edges
- graph.summary.md: Overview with fan-in/fan-out rankings and crate inventory
- sccs.md: SCC analysis confirming no cycles at crate or file level (clean DAG)
- layers.observed.md: 5-layer architecture diagram derived from dependencies
- hotspots.md: Coupling hotspots (g3-config highest fan-in, g3-cli highest fan-out)
- limitations.md: Documented extraction limitations (conditional compilation, macros, etc.)
Key findings:
- All 10 workspace crates form a directed acyclic graph
- g3-core/src/ui_writer.rs has highest file-level fan-in (10 dependents)
- g3-console is standalone with no workspace dependencies
- Clean layered architecture with no violations detected
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