docs: add mkdocs, update links, add architecture documentation

docs/content/stories/phase4/4.7.1-create-modulesblogpkgmodulego.md

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+# Task 4.7.1: Create `modules/blog/pkg/module.go`:
+
+## Metadata
+- **Task ID**: 4.7.1
+- **Title**: Create `modules/blog/pkg/module.go`:
+- **Phase**: 4 - Sample Feature Module (Blog)
+- **Section**: 4.7
+- **Status**: Pending
+- **Priority**: High
+- **Estimated Time**: TBD
+- **Dependencies**: TBD
+
+## Description
+Create `modules/blog/pkg/module.go`:
+
+## Requirements
+- Create `modules/blog/pkg/module.go`:
+
+## Implementation Steps
+1. TODO: Add implementation steps
+2. TODO: Add implementation steps
+3. TODO: Add implementation steps
+
+## Acceptance Criteria
+- [ ] Task 4.7.1 is completed
+- [ ] All requirements are met
+- [ ] Code compiles and tests pass
+
+## Related ADRs
+- See relevant ADRs in `docs/adr/`
+
+## Implementation Notes
+- TODO: Add implementation notes
+
+## Testing
+```bash
+# TODO: Add test commands
+go test ./...
+```
+
+
+## Code Reference
+
+```go
+type BlogModule struct{}
+  
+  func (b BlogModule) Name() string { return "blog" }
+  func (b BlogModule) Version() string { return "0.1.0" }
+  func (b BlogModule) Dependencies() []string { return nil }
+  func (b BlogModule) Init() fx.Option {
+      return fx.Options(
+          fx.Provide(NewPostRepo),
+          fx.Provide(NewPostService),
+          fx.Invoke(RegisterHandlers),
+      )
+  }
+  func (b BlogModule) Migrations() []func(*ent.Client) error {
+      return []func(*ent.Client) error{
+          func(c *ent.Client) error {
+              return c.Schema.Create(context.Background())
+          },
+      }
+  }
+  
+  var Module BlogModule
+  
+  func init() {
+      registry.Register(Module)
+  }
+```