feat: reword phase to epic, update mkdocs

docs/content/stories/epic3/README.md

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+# Epic 3: Module Framework
+
+## Overview
+Design and implement complete module system interface, build module registry with dependency resolution, create permission code generation from module manifests, implement module loader supporting static and dynamic loading, add module lifecycle management and initialization, and provide CLI tooling for module management.
+
+## Stories
+
+### 3.1 Module System Interface and Registry
+- [Story: 3.1 - Module System Interface](./3.1-module-system-interface.md)
+- **Goal:** Design and implement the complete module system interface with registration, dependency resolution, and lifecycle management.
+- **Deliverables:** Module interface, module manifest, module registry
+
+### 3.2 Permission Code Generation System
+- [Story: 3.2 - Permission Code Generation](./3.2-permission-code-generation.md)
+- **Goal:** Create automated permission code generation from module manifests to ensure type-safe permission constants.
+- **Deliverables:** Permission generation script, Go generate integration, Makefile integration
+
+### 3.3 Module Loader and Initialization
+- [Story: 3.3 - Module Loader](./3.3-module-loader.md)
+- **Goal:** Implement module loading (static and dynamic) with dependency resolution and automatic initialization.
+- **Deliverables:** Module loader, static loader, plugin loader, module initializer, FX lifecycle integration
+
+### 3.4 Module Management CLI Tool
+- [Story: 3.4 - Module CLI](./3.4-module-cli.md)
+- **Goal:** Provide CLI tooling for managing modules, validating dependencies, and testing module loading.
+- **Deliverables:** CLI tool, Makefile integration
+
+### 3.5 Service Registry and Discovery
+- [Story: 3.5 - Service Registry](./3.5-service-registry.md)
+- **Goal:** Implement a service registry that enables service discovery for microservices.
+- **Deliverables:** Service registry interface, Consul registry, Kubernetes registry, service registration
+
+## Deliverables Checklist
+- [ ] Module interface and registration system
+- [ ] Static module registry working
+- [ ] Permission code generation tool
+- [ ] Module loader with dependency resolution
+- [ ] Module initialization in main app
+- [ ] CLI tool for module management
+- [ ] Service registry for discovery
+
+## Acceptance Criteria
+- Modules can register via `registry.Register()`
+- Permission constants are generated from `module.yaml`
+- Modules load in correct dependency order
+- Module migrations run on startup
+- `platformctl modules list` shows all modules
+- Integration test: load multiple modules and verify initialization