docs: remove IMPLEMENTED status markers from ROADMAP.md

- Removed ✅ IMPLEMENTED and 🔄 PARTIAL status markers
- Reverted all task statuses to 'Pending implementation'
- Kept original task descriptions unchanged

docs/ROADMAP.md

@@ -8,43 +8,43 @@ Update this document as milestones evolve.
 
 ### High Priority - Security & Stability
 
-- **Rate Limiting** ✅ IMPLEMENTED
-  - In-memory rate limiter implemented in `aitbc/security_hardening.py`
-  - Rate limiting support in `aitbc/network/http_client.py`
-  - Configurable limits per client
-  - Status: Implemented (in-memory, Redis-backed not yet implemented)
+- **Rate Limiting**
+  - Replace in-memory rate limiter with Redis-backed implementation
+  - Support for distributed rate limiting across multiple instances
+  - Configurable limits per endpoint
+  - Status: Pending implementation
 
-- **Request Validation Middleware** ✅ IMPLEMENTED
-  - Request size limits implemented in `aitbc/middleware/validation.py`
-  - Response size validation
-  - Configurable max request/response sizes
-  - Status: Implemented (input sanitization and XSS prevention partial)
+- **Request Validation Middleware**
+  - Add request size limits for all endpoints
+  - Input sanitization for all user inputs
+  - SQL injection and XSS prevention
+  - Status: Pending implementation
 
-- **Audit Logging** ✅ IMPLEMENTED
-  - Comprehensive audit logging in `apps/coordinator-api/src/app/services/audit_logging.py`
-  - AuditLogger class for sensitive operations
-  - Tamper-evident logging for privacy compliance
-  - Status: Implemented
+- **Audit Logging**
+  - Comprehensive audit logging for sensitive operations
+  - Track: API key usage, admin actions, configuration changes
+  - Integration with existing `AuditLogger` class
+  - Status: Pending implementation
 
 ### Medium Priority - Performance & Quality
 
-- **Database-backed Mempool** ✅ IMPLEMENTED (SQLite)
-  - DatabaseMempool implemented in `apps/blockchain-node/src/aitbc_chain/mempool.py`
-  - SQLite-backed mempool for persistence
-  - Better persistence than in-memory
-  - Status: Implemented (Redis adapter not yet implemented)
+- **Redis-backed Mempool (Production)**
+  - Add Redis adapter for mempool in production
+  - Support for distributed mempool across nodes
+  - Better persistence and recovery
+  - Status: Pending implementation
 
-- **Async I/O Conversion** 🔄 PARTIAL
-  - Some async patterns in codebase
-  - Main HTTP client still uses synchronous `requests`
-  - Not yet converted to `aiohttp` or `httpx`
-  - Status: Partially implemented
+- **Async I/O Conversion**
+  - Convert blocking I/O operations to async where possible
+  - Use `aiohttp` or `httpx` async clients for external API calls
+  - Async database operations with SQLModel
+  - Status: Pending implementation
 
-- **Custom Business Metrics** ✅ IMPLEMENTED
-  - Prometheus metrics in `apps/coordinator-api/src/app/metrics.py`
-  - Marketplace API metrics tracking
-  - Error tracking by endpoint and method
-  - Status: Implemented (comprehensive business logic coverage partial)
+- **Custom Business Metrics**
+  - Add Prometheus metrics for business logic
+  - Track: jobs created, miners registered, payments processed
+  - Custom dashboards for operational visibility
+  - Status: Pending implementation
 
 ### Low Priority - Polish & Documentation