feat: add logging, marketplace, and admin enhancements

Database & Migrations:
- Add application_logs table migration for hybrid cloud logging
- Add companies table migration and restructure vendor relationships

Logging System:
- Implement hybrid logging system (database + file)
- Add log_service for centralized log management
- Create admin logs page with filtering and viewing capabilities
- Add init_log_settings.py script for log configuration
- Enhance core logging with database integration

Marketplace Integration:
- Add marketplace admin page with product management
- Create marketplace vendor page with product listings
- Implement marketplace.js for both admin and vendor interfaces
- Add marketplace integration documentation

Admin Enhancements:
- Add imports management page and functionality
- Create settings page for admin configuration
- Add vendor themes management page
- Enhance vendor detail and edit pages
- Improve code quality dashboard and violation details
- Add logs viewing and management
- Update icons guide and shared icon system

Architecture & Documentation:
- Document frontend structure and component architecture
- Document models structure and relationships
- Add vendor-in-token architecture documentation
- Add vendor RBAC (role-based access control) documentation
- Document marketplace integration patterns
- Update architecture patterns documentation

Infrastructure:
- Add platform static files structure (css, img, js)
- Move architecture_scan.py to proper models location
- Update model imports and registrations
- Enhance exception handling
- Update dependency injection patterns

UI/UX:
- Improve vendor edit interface
- Update admin user interface
- Enhance page templates documentation
- Add vendor marketplace interface

models/database/admin.py

@@ -8,6 +8,7 @@ This module provides models for:
 - Admin notifications (system alerts and warnings)
 - Platform settings (global configuration)
 - Platform alerts (system-wide issues)
+- Application logs (critical events logging)
 """
 
 from sqlalchemy import (
@@ -190,3 +191,37 @@ class AdminSession(Base, TimestampMixin):
 
     def __repr__(self):
         return f"<AdminSession(id={self.id}, admin_user_id={self.admin_user_id}, is_active={self.is_active})>"
+
+
+class ApplicationLog(Base, TimestampMixin):
+    """
+    Application-level logs stored in database for critical events.
+
+    Stores WARNING, ERROR, and CRITICAL level logs for easy searching,
+    filtering, and compliance. INFO and DEBUG logs are kept in files only.
+    """
+
+    __tablename__ = "application_logs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    timestamp = Column(DateTime, nullable=False, index=True)
+    level = Column(String(20), nullable=False, index=True)  # WARNING, ERROR, CRITICAL
+    logger_name = Column(String(200), nullable=False, index=True)
+    module = Column(String(200))
+    function_name = Column(String(100))
+    line_number = Column(Integer)
+    message = Column(Text, nullable=False)
+    exception_type = Column(String(200))
+    exception_message = Column(Text)
+    stack_trace = Column(Text)
+    request_id = Column(String(100), index=True)  # For correlating logs
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True, index=True)
+    vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=True, index=True)
+    context = Column(JSON)  # Additional context data
+
+    # Relationships
+    user = relationship("User", foreign_keys=[user_id])
+    vendor = relationship("Vendor", foreign_keys=[vendor_id])
+
+    def __repr__(self):
+        return f"<ApplicationLog(id={self.id}, level='{self.level}', logger='{self.logger_name}')>"