Setup Service Container

[michaelbeale-IL]

Configure Microsoft.Extensions.DependencyInjection in Program.cs and establish service registration patterns.

Acceptance Criteria:

• ServiceCollection configured in ACATApp and ACATTalk
• ServiceCollectionExtensions created for core modules
• Service lifetimes properly configured
• Documentation for service registration patterns
• Build passing, no regressions

Technical Details:

• Add Microsoft.Extensions.DependencyInjection NuGet package
• Create ConfigureServices() method in Program.cs
• Register logging infrastructure
• Register configuration services
• Create extension methods for module registration

Files to Modify:

• Applications/ACATApp/Program.cs
• Applications/ACATTalk/Program.cs
• Create Libraries/ACATCore/DependencyInjection/ServiceCollectionExtensions.cs

---

Epic: Dependency Injection Infrastructure

Estimated Effort: 2 days

---

Parent Feature: #190 - Dependency Injection Infrastructure