docs(zh,en): add ch-06 causality mental-model articles

[PanQiWei]

Summary

• 6 bilingual articles (ZH + EN, independently written) exploring causality as a mental model for agentic systems
  • 01 Hume's Fork — humans never observe causation, only constant conjunction
  • 02 Ocean of Correlation — NTP learns token-level constant conjunction
  • 03 The Ladder — Pearl's causal hierarchy theorem proves correlation data can't answer interventional questions
  • 04 Causal Discipline — four structural requirements derived from the nature of causality
  • 05 The Cost of Honesty — when causal discipline is worth the engineering cost
  • 06 The Dao of Causality — resonance with cybernetics, entropy, fractals; tail hook to ch-07
• 57 new wiki pages across 8 ingested sources (Hume, Aristotle, Pearl, causation metaphysics, regularity/counterfactual theories, problem of induction)
• 14 infographic cards (7 ZH + 7 EN) for chapter overview and each article
• Targeted fixes to ch-01 and ch-03: NTP-only framing, unverifiable benchmark claims, Claude 2 context window, error cascade formula attribution, self-correction claim qualification

Test plan

• uv run mkdocs build -f mkdocs.en.yml passes (0 warnings)
• uv run mkdocs build -f mkdocs.zh.yml passes (pre-existing wiki link warnings only)
• Adversarial fact-check on all claims, data points, and citations
• 道-vs-術 self-check: no prescriptive language in mental-model articles
• No internal system references (omne-next, OMNE, veracity)
• All card footers: "Generated with ljg-card | Advanced Agentic Dev Patterns"

🤖 Generated with Claude Code