Summary

Create the second part of the cross-system integration guide, covering common integration scenarios and configuration management across systems.

Parent Issue

Part of: #329

Dependencies

Blocked by: #334 (Part 1 must be completed first)

Scope (What)

Continue docs/INTEGRATION_GUIDE.md with the following sections:

3. Common Integration Scenarios

Document at least 4 integration scenarios with code examples:

For each scenario:

• Required systems and their roles
• Configuration template
• Code example (50-100 lines)
• Common pitfalls and solutions

4. Configuration Across Systems

Document unified configuration strategy:

• Per-system configuration sections
• Shared settings (thread pool sizes, log levels, timeouts)
• System-specific overrides
• Configuration validation and defaults
• Environment variable mapping

Example structure:

common:
  thread_pool_size: 8
  log_level: info

network:
  http_port: 8080
  connection_timeout: 30s

database:
  pool_size: 10
  query_timeout: 5s

Acceptance Criteria

• At least 4 integration scenario examples documented
• Each scenario includes code example and configuration
• Unified configuration structure documented
• Shared vs. system-specific settings explained
• Configuration validation strategy documented

Deliverables

• docs/INTEGRATION_GUIDE.md (Sections 3-4)
• Configuration examples for each scenario