#203 Apps: Implement API endpoints for tenant app installations

## Parent Epic: #195 ## Description Create API endpoints for tenant app installation management. ## Location api/blueprints/v1/tenant_apps.py ## Endpoints ### Installation Management POST /api/v1/tenant/apps/{app_id}/install - Install app to tenant - Body: {version_id, configuration, auto_update, update_channel} - Permission: install_apps DELETE /api/v1/tenant/apps/{app_id} - Uninstall app from tenant - Permission: uninstall_apps GET /api/v1/tenant/apps - List installed apps - Query: status, page, page_size - Permission: view_apps GET /api/v1/tenant/apps/{app_id} - Get installation details - Permission: view_apps PATCH /api/v1/tenant/apps/{app_id}/config - Update app configuration - Body: {configuration} - Permission: configure_apps POST /api/v1/tenant/apps/{app_id}/upgrade - Upgrade to new version - Body: {version_id} - Permission: install_apps POST /api/v1/tenant/apps/{app_id}/enable - Enable disabled app - Permission: configure_apps POST /api/v1/tenant/apps/{app_id}/disable - Disable app - Permission: configure_apps ### Secrets Management POST /api/v1/tenant/apps/{app_id}/secrets - Set app secret - Body: {secret_name, secret_value} - Permission: manage_app_secrets - Stores in Vault, records reference in secrets_config DELETE /api/v1/tenant/apps/{app_id}/secrets/{name} - Delete secret - Permission: manage_app_secrets GET /api/v1/tenant/apps/{app_id}/secrets - List secret names (NOT values) - Permission: view_apps ### Execution Logs GET /api/v1/tenant/apps/{app_id}/logs - Get execution logs for specific app - Query: status, from_date, to_date, page, page_size - Permission: view_app_logs GET /api/v1/apps/logs - Get all app execution logs - Permission: view_app_logs ## Tenant Context - All endpoints require X-Tenant-ID header - Tenant isolation enforced ## Testing - Installation lifecycle tests - Configuration update tests - Secret management tests - Log query tests