docs: v3.9.6 - Trust Calibration, Vibe Coding Trap, reference.yaml sync

Added:
- ultimate-guide.md: Trust Calibration section (1.7) with research-backed verification strategies
- ultimate-guide.md: Infrastructure as Code Skills (Anton Babenko's terraform-skill)
- learning-with-ai.md: "The Vibe Coding Trap" anti-pattern (Karpathy, Feb 2025)
- learning-with-ai.md: "Reality of AI Productivity" section with research
- learning-with-ai.md: External resource link to leerob.com/ai (AI fundamentals)
- IDEAS.md: "Vibe Coding Discourse" watching entry

Changed:
- reference.yaml: Complete line number synchronization (~55 entries)
  Guide grew from ~9900 to 11154 lines; all deep_dive references updated
- Version bump: 3.9.5 → 3.9.6

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

IDEAS.md

@@ -102,6 +102,14 @@ Using external LLMs (Gemini, GPT-4) as "second opinion" from Claude Code.
 
 **Source:** [daily.dev article](https://app.daily.dev/posts/make-claude-code-opus-talk-to-gemini-pro-b7pyiq394)
 
+### Vibe Coding Discourse
+
+Evolution of the "developer as architect" narrative in AI-assisted development.
+
+**Reference:** [Craig Adam - "Agile is Out, Architecture is Back"](https://medium.com/@craig_32726/agile-is-out-architecture-is-back-7586910ab810)
+
+**Status:** Watching. Term "vibe coding" now mainstream (Collins Word of the Year 2025).
+
 ---
 
 ## Discarded Ideas