Edit Issue - .issue.db

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Description

## Parent Epic: #195

## Description
Create API endpoints for app registry CRUD operations.

## Location
api/blueprints/v1/apps.py

## Endpoints

### App Registry (requires register_apps/update_apps/delete_apps)

POST /api/v1/apps
- Register new app
- Body: {app_name, display_name, description, category, tags, visibility}
- Permission: register_apps

GET /api/v1/apps
- List apps with pagination/filters
- Query: page, page_size, category, status, visibility
- Permission: view_apps

GET /api/v1/apps/{app_id}
- Get app details with versions
- Permission: view_apps

PATCH /api/v1/apps/{app_id}
- Update app metadata
- Permission: update_apps

DELETE /api/v1/apps/{app_id}
- Soft delete app
- Permission: delete_apps

### Version Management

POST /api/v1/apps/{app_id}/versions
- Create new version (draft)
- Body: {version, entrypoint_type, entrypoint_config, actions, configuration_schema, required_secrets}
- Permission: update_apps

GET /api/v1/apps/{app_id}/versions
- List all versions
- Permission: view_apps

GET /api/v1/apps/{app_id}/versions/{version_id}
- Get version details
- Permission: view_apps

POST /api/v1/apps/{app_id}/versions/{version_id}/publish
- Publish draft version
- Permission: publish_apps

POST /api/v1/apps/{app_id}/versions/{version_id}/deprecate
- Deprecate version
- Permission: update_apps

### Discovery

GET /api/v1/apps/marketplace
- Browse public/tenant apps
- Permission: view_apps

GET /api/v1/apps/categories
- List categories
- Permission: view_apps

GET /api/v1/apps/search
- Search apps
- Query: q, category, tags
- Permission: view_apps

## Response Format
Standard response.py patterns with pagination

## Error Handling
- 400: Invalid input
- 403: Permission denied
- 404: App/version not found
- 409: Conflict (duplicate name)

## Testing
- API integration tests
- Permission tests
- Pagination tests
- Error handling tests

Due Date (YYYY-MM-DD)

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Edit Issue #202