feat: reword phase to epic, update mkdocs

docs/content/adr/0007-project-directory-structure.md

@@ -29,11 +29,11 @@ goplt/
 │   ├── config/            # ConfigProvider interface
 │   ├── logger/            # Logger interface
 │   ├── module/            # IModule interface
-│   ├── auth/              # Auth interfaces (Phase 2)
-│   ├── perm/              # Permission DSL (Phase 2)
+│   ├── auth/              # Auth interfaces (Epic 2)
+│   ├── perm/              # Permission DSL (Epic 2)
 │   └── infra/             # Infrastructure interfaces
 ├── modules/               # Feature modules
-│   └── blog/              # Sample module (Phase 4)
+│   └── blog/              # Sample module (Epic 4)
 ├── config/                # Configuration files
 │   ├── default.yaml
 │   ├── development.yaml
@@ -75,7 +75,7 @@ goplt/
 
 ### Implementation Notes
 - Initialize with `go mod init git.dcentral.systems/toolz/goplt`
-- Create all directories upfront in Phase 0
+- Create all directories upfront in Epic 0
 - Document structure in `README.md`
 - Enforce boundaries via `internal/` package visibility
 - Use `go build ./...` to verify structure

docs/content/adr/0015-error-bus-implementation.md

@@ -21,7 +21,7 @@ Implement a **channel-based error bus** with pluggable sinks:
 
 1. **Error bus interface**: `type ErrorPublisher interface { Publish(err error) }`
 2. **Channel-based implementation**: Background goroutine consumes errors from channel
-3. **Pluggable sinks**: Logger (always), Sentry (optional, Phase 6)
+3. **Pluggable sinks**: Logger (always), Sentry (optional, Epic 6)
 4. **Panic recovery middleware**: Automatically publishes panics to error bus
 
 **Rationale:**

docs/content/adr/0029-microservices-architecture.md

@@ -65,16 +65,16 @@ Design the platform as **microservices architecture from day one**:
 
 ## Implementation Strategy
 
-### Phase 1: Service Client Interfaces (Phase 1)
+### Epic 1: Service Client Interfaces (Epic 1)
 - Define service client interfaces for all core services
 - All inter-service communication goes through interfaces
 
-### Phase 2: Service Registry (Phase 3)
+### Epic 2: Service Registry (Epic 3)
 - Create service registry interface
 - Implement service discovery
 - Support for Consul, Kubernetes service discovery
 
-### Phase 3: gRPC Services (Phase 5)
+### Epic 3: gRPC Services (Epic 5)
 - Implement gRPC service definitions
 - Create gRPC servers for all services
 - Create gRPC clients for service communication

docs/content/adr/README.md

@@ -20,7 +20,7 @@ Each ADR follows this structure:
 
 ## ADR Index
 
-### Phase 0: Project Setup & Foundation
+### Epic 0: Project Setup & Foundation
 
 - [ADR-0001: Go Module Path](./0001-go-module-path.md) - Module path: `git.dcentral.systems/toolz/goplt`
 - [ADR-0002: Go Version](./0002-go-version.md) - Go 1.24.3
@@ -35,37 +35,37 @@ Each ADR follows this structure:
 - [ADR-0011: Code Generation Tools](./0011-code-generation-tools.md) - go generate workflow
 - [ADR-0012: Logger Interface Design](./0012-logger-interface-design.md) - Logger interface abstraction
 
-### Phase 1: Core Kernel & Infrastructure
+### Epic 1: Core Kernel & Infrastructure
 
 - [ADR-0013: Database ORM Selection](./0013-database-orm.md) - entgo.io/ent
 - [ADR-0014: Health Check Implementation](./0014-health-check-implementation.md) - Custom health check registry
 - [ADR-0015: Error Bus Implementation](./0015-error-bus-implementation.md) - Channel-based error bus with pluggable sinks
 - [ADR-0016: OpenTelemetry Observability Strategy](./0016-opentelemetry-observability.md) - OpenTelemetry for tracing, metrics, logs
 
-### Phase 2: Authentication & Authorization
+### Epic 2: Authentication & Authorization
 
 - [ADR-0017: JWT Token Strategy](./0017-jwt-token-strategy.md) - Short-lived access tokens + long-lived refresh tokens
 - [ADR-0018: Password Hashing Algorithm](./0018-password-hashing.md) - argon2id
 - [ADR-0019: Permission DSL Format](./0019-permission-dsl-format.md) - String-based format with code generation
 - [ADR-0020: Audit Logging Storage](./0020-audit-logging-storage.md) - PostgreSQL append-only table with JSONB metadata
 
-### Phase 3: Module Framework
+### Epic 3: Module Framework
 
 - [ADR-0021: Module Loading Strategy](./0021-module-loading-strategy.md) - Static registration (primary) + dynamic plugin loading (optional)
 
-### Phase 5: Infrastructure Adapters
+### Epic 5: Infrastructure Adapters
 
 - [ADR-0022: Cache Implementation](./0022-cache-implementation.md) - Redis with in-memory fallback
 - [ADR-0023: Event Bus Implementation](./0023-event-bus-implementation.md) - In-process bus (default) + Kafka (production)
 - [ADR-0024: Background Job Scheduler](./0024-job-scheduler.md) - asynq (Redis-backed) + cron
 - [ADR-0025: Multi-tenancy Model](./0025-multitenancy-model.md) - Shared database with tenant_id column (optional)
 
-### Phase 6: Observability & Production Readiness
+### Epic 6: Observability & Production Readiness
 
 - [ADR-0026: Error Reporting Service](./0026-error-reporting-service.md) - Sentry (optional, configurable)
 - [ADR-0027: Rate Limiting Strategy](./0027-rate-limiting-strategy.md) - Multi-level (per-user + per-IP) with Redis
 
-### Phase 7: Testing, Documentation & CI/CD
+### Epic 7: Testing, Documentation & CI/CD
 
 - [ADR-0028: Testing Strategy](./0028-testing-strategy.md) - Multi-layered (unit, integration, contract, load)