style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

models/database/admin.py

@@ -1,4 +1,4 @@
-# Admin-specific models 
+# Admin-specific models
 # models/database/admin.py
 """
 Admin-specific database models.
@@ -10,9 +10,12 @@ This module provides models for:
 - Platform alerts (system-wide issues)
 """
 
-from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, JSON, ForeignKey
+from sqlalchemy import (JSON, Boolean, Column, DateTime, ForeignKey, Integer,
+                        String, Text)
 from sqlalchemy.orm import relationship
+
 from app.core.database import Base
+
 from .base import TimestampMixin
 
 
@@ -23,12 +26,17 @@ class AdminAuditLog(Base, TimestampMixin):
     Separate from regular audit logs - focuses on admin-specific operations
     like vendor creation, user management, and system configuration changes.
     """
+
     __tablename__ = "admin_audit_logs"
 
     id = Column(Integer, primary_key=True, index=True)
     admin_user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
-    action = Column(String(100), nullable=False, index=True)  # create_vendor, delete_vendor, etc.
-    target_type = Column(String(50), nullable=False, index=True)  # vendor, user, import_job, setting
+    action = Column(
+        String(100), nullable=False, index=True
+    )  # create_vendor, delete_vendor, etc.
+    target_type = Column(
+        String(50), nullable=False, index=True
+    )  # vendor, user, import_job, setting
     target_id = Column(String(100), nullable=False, index=True)
     details = Column(JSON)  # Additional context about the action
     ip_address = Column(String(45))  # IPv4 or IPv6
@@ -49,11 +57,16 @@ class AdminNotification(Base, TimestampMixin):
     Different from vendor/customer notifications - these are for platform
     administrators to track system health and issues requiring attention.
     """
+
     __tablename__ = "admin_notifications"
 
     id = Column(Integer, primary_key=True, index=True)
-    type = Column(String(50), nullable=False, index=True)  # system_alert, vendor_issue, import_failure
-    priority = Column(String(20), default="normal", index=True)  # low, normal, high, critical
+    type = Column(
+        String(50), nullable=False, index=True
+    )  # system_alert, vendor_issue, import_failure
+    priority = Column(
+        String(20), default="normal", index=True
+    )  # low, normal, high, critical
     title = Column(String(200), nullable=False)
     message = Column(Text, nullable=False)
     is_read = Column(Boolean, default=False, index=True)
@@ -84,13 +97,16 @@ class AdminSetting(Base, TimestampMixin):
     - smtp_settings
     - stripe_api_keys (encrypted)
     """
+
     __tablename__ = "admin_settings"
 
     id = Column(Integer, primary_key=True, index=True)
     key = Column(String(100), unique=True, nullable=False, index=True)
     value = Column(Text, nullable=False)
     value_type = Column(String(20), default="string")  # string, integer, boolean, json
-    category = Column(String(50), index=True)  # system, security, marketplace, notifications
+    category = Column(
+        String(50), index=True
+    )  # system, security, marketplace, notifications
     description = Column(Text)
     is_encrypted = Column(Boolean, default=False)
     is_public = Column(Boolean, default=False)  # Can be exposed to frontend?
@@ -110,11 +126,16 @@ class PlatformAlert(Base, TimestampMixin):
     Tracks platform issues, performance problems, security incidents,
     and other system-level concerns that require admin attention.
     """
+
     __tablename__ = "platform_alerts"
 
     id = Column(Integer, primary_key=True, index=True)
-    alert_type = Column(String(50), nullable=False, index=True)  # security, performance, capacity, integration
-    severity = Column(String(20), nullable=False, index=True)  # info, warning, error, critical
+    alert_type = Column(
+        String(50), nullable=False, index=True
+    )  # security, performance, capacity, integration
+    severity = Column(
+        String(20), nullable=False, index=True
+    )  # info, warning, error, critical
     title = Column(String(200), nullable=False)
     description = Column(Text)
     affected_vendors = Column(JSON)  # List of affected vendor IDs
@@ -142,6 +163,7 @@ class AdminSession(Base, TimestampMixin):
     Helps identify suspicious login patterns, track concurrent sessions,
     and enforce session policies for admin users.
     """
+
     __tablename__ = "admin_sessions"
 
     id = Column(Integer, primary_key=True, index=True)