[PHASE-6] Update implementation plan

docs/IMPLEMENTATION.md

@@ -77,23 +77,33 @@
 - [X] Fix application tests for new protocol design
 
 ## Phase 6: TCP Server & Connection Management
-- [ ] Implement TCP server with connection handling
-- [ ] Add dual timeout protection:
-  - [ ] Connection timeout (max total connection time)
-  - [ ] Read timeout (max idle time between bytes - slowloris protection)
-- [ ] Implement proper connection lifecycle management
-- [ ] Create protocol state machine for request/response flow
-- [ ] Add graceful connection cleanup and error handling
-- [ ] Implement basic client for testing
-- [ ] Write integration tests for client-server communication
+- [X] Implement TCP server with connection handling
+- [X] Add dual timeout protection:
+  - [X] Connection timeout (max total connection time)
+  - [X] Read timeout (max idle time between bytes - slowloris protection)
+- [X] Implement proper connection lifecycle management
+- [X] Create protocol state machine for request/response flow
+- [X] Add graceful connection cleanup and error handling
+- [X] Add slog structured logging to TCP server
+- [X] Implement functional options pattern for server configuration
+- [X] Update cmd/server to use new TCP server with logging
 
-## Phase 7: Basic Server Architecture
-- [ ] Set up structured logging (zerolog/logrus)
+## Phase 7: Client Implementation
+- [ ] Create client application structure
+- [ ] Implement PoW solver algorithm on client side
+- [ ] Create client-side protocol implementation
+- [ ] Add retry logic and error handling
+- [ ] Implement connection management
+- [ ] Create CLI interface for client
+- [ ] Add client structured logging
+- [ ] Write client unit and integration tests
+
+## Phase 8: Basic Server Architecture
 - [ ] Set up metrics collection (prometheus)
 - [ ] Create configuration management
 - [ ] Integrate all components into server architecture
 
-## Phase 8: Advanced Server Features
+## Phase 9: Advanced Server Features
 - [ ] Add connection pooling and advanced connection management
 - [ ] Implement graceful shutdown mechanism
 - [ ] Add health check endpoints
@@ -101,7 +111,7 @@
 - [ ] Create health check endpoints
 - [ ] Write integration tests for server core
 
-## Phase 9: DDOS Protection & Rate Limiting
+## Phase 10: DDOS Protection & Rate Limiting
 - [ ] Implement IP-based connection limiting
 - [ ] Create rate limiting service with time windows
 - [ ] Add automatic difficulty adjustment based on load
@@ -110,7 +120,7 @@
 - [ ] Add monitoring for attack detection
 - [ ] Write tests for protection mechanisms
 
-## Phase 10: Observability & Monitoring
+## Phase 11: Observability & Monitoring
 - [ ] Add structured logging throughout application
 - [ ] Implement metrics for key performance indicators:
   - [ ] Active connections count
@@ -122,7 +132,7 @@
 - [ ] Add error categorization and reporting
 - [ ] Implement health check endpoints
 
-## Phase 11: Configuration & Environment Setup
+## Phase 12: Configuration & Environment Setup
 - [ ] Create configuration structure with validation
 - [ ] Support environment variables and config files
 - [ ] Add configuration for different environments (dev/prod)
@@ -130,16 +140,6 @@
 - [ ] Create deployment configuration templates
 - [ ] Add configuration validation and defaults
 
-## Phase 12: Client Implementation
-- [ ] Create client application structure
-- [ ] Implement PoW solver algorithm
-- [ ] Create client-side protocol implementation
-- [ ] Add retry logic and error handling
-- [ ] Implement connection management
-- [ ] Create CLI interface for client
-- [ ] Add client metrics and logging
-- [ ] Write client unit and integration tests
-
 ## Phase 13: Docker & Deployment
 - [ ] Create multi-stage Dockerfile for server
 - [ ] Create Dockerfile for client