feat: Add Event-Driven Architecture semantic anchor

[Nantero1]

Summary

• Adds Event-Driven Architecture as a new semantic anchor
• Covers Hohpe/Woolf's async decoupling patterns from Enterprise Integration Patterns (2003)
• Includes anchor file, all-anchors include, and AgentSkill catalog entry

Why this anchor?

EDA is a foundational architectural style with zero coverage in the catalog. It activates: event producers/consumers, publish-subscribe, async decoupling, message queues, at-least-once delivery, idempotency, eventual consistency, choreography vs. orchestration.

The catalog already has architectural anchors (Hexagonal, Clean, DDD) but none covering event-based communication — a gap given how pervasive async messaging is in modern systems.

Key separations from existing anchors:

• vs. CQRS (if accepted): CQRS separates read/write models and can use events but doesn't have to — architectural responsibility, not communication style
• vs. Observer (GoF): single-process, synchronous notification — EDA is distributed and async
• vs. DDD Domain Events: DDD events are a tactical building block; EDA is the architectural style that governs how events flow between components

Files changed

• docs/anchors/event-driven-architecture.adoc — new anchor file
• docs/all-anchors.adoc — added include in Software Architecture section
• skill/semantic-anchor-translator/references/catalog.md — added catalog entry

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Reviewing files that changed from the base of the PR and between aefa0b4 and defe645.

📒 Files selected for processing (3)

• docs/all-anchors.adoc
• docs/anchors/event-driven-architecture.adoc
• skill/semantic-anchor-translator/references/catalog.md

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[raifdmueller]

Review: ✅ Good anchor, merge-ready.

Event-Driven Architecture is a well-defined architectural style with clear attribution (Hohpe/Woolf EIP, 2003). Strong content — the choreography vs. orchestration distinction is particularly valuable as a semantic anchor for LLM communication.

Post-merge TODO:

• Add German translation (event-driven-architecture.de.adoc)

Merging recommended, translation will follow in batch (see #149).