chore: remove dead tooling configs, stale docs, fix stale references

Delete treemapper artifacts, renovate.json (dependabot is live), orphan
knip.json, dead .yamllint (pre-commit inline -d overrides it), duplicate
root mkdocs.yml (old certamen-framework name), stale ANALYSIS.md and
web_auth_audit_2025.md, and the broken try-it-now.md demo page (missing
notebook). Refresh CLAUDE.md architecture to the real 6-layer DDD tree,
align biome schema to 2.5.2, and gitignore local work-logs.

Claude-Session: https://claude.ai/code/session_01KGUEXHcGDrqkCGPz7Y1G88

Author: nikolay-e

.gitignore

@@ -179,3 +179,7 @@ TODO.md
 
 GITHUB_PAGES_SETUP.md
 .treemapper/
+
+# Local analysis work-logs and theory configs
+config.diffctx-theory.yml
+ANALYSIS_*.md

.treemapperignore

@@ -62,7 +62,7 @@ method.
 │  certamen --config config.yml  │
 │  ┌───────────────────────────┐  │
 │  │  Tournament Engine        │  │
-│  │  (src/certamen/core/)    │  │
+│  │  (src/certamen/domain/)   │  │
 │  │  ├─ Competitors (LLMs)    │  │
 │  │  ├─ Judges (LLMs)         │  │
 │  │  ├─ Rubrics & Scoring     │  │
@@ -75,21 +75,22 @@ method.
 
 ### Core Components
 
+Layered DDD structure (6 layers: interfaces → application →
+infrastructure → domain → ports → shared):
+
 ```text
 src/certamen/
-├── core/
-│   ├── tournament.py      # Tournament orchestration
-│   ├── scorer.py          # Rubric-based scoring
-│   ├── knowledge_bank.py  # Insight extraction
-│   ├── nodes/             # Workflow node system
-│   └── executor/          # Graph executor
-├── models/
-│   └── litellm.py         # LLM provider adapters
-├── cli/
-│   └── main.py            # CLI entry point
-├── config/                # Configuration loading
-├── serialization/         # YAML workflow loader
-└── utils/                 # Utilities
+├── interfaces/         # Entry points: cli/, web/, render/
+├── application/        # Orchestration: execution/, workflow/, cost/
+├── domain/            # Core logic: tournament/, interrogation/,
+│                      #   disagreement/, knowledge/, knowledge_map/,
+│                      #   confidence/, prompts/, reporting/
+├── infrastructure/    # Adapters: llm/, config/, cache/, events/,
+│                      #   persistence/, secrets/, similarity/, serialization/
+├── ports/             # Protocols/ABCs (BaseModel, EventHandler,
+│                      #   HostEnvironment, SimilarityEngine)
+├── shared/            # Cross-cutting: text/, json_utils, logging/
+└── workflows/         # Bundled YAML workflow definitions
 ```
 
 ## Configuration

.yamllint

@@ -61,7 +61,6 @@ plugins:
 
 nav:
   - Home: index.md
-  - Try It Now: try-it-now.md
   - ROI Calculator: calculator.html
 
 extra: