Add feature flags, seed data utilities, and Angular frontend scaffold

Major enhancements:
- Feature flag system for cloud vs air-gapped deployment modes
- Automatic storage backend selection based on deployment mode
- Comprehensive seed data generation utilities
- Support for generating CSV, JSON, binary, and PCAP test files
- Quick seed script for easy data generation
- Angular 19 frontend complete setup documentation
- Material Design UI component examples and configuration

Fixes:
- Resolve SQLAlchemy metadata column name conflict
- Rename metadata to custom_metadata throughout codebase
- Fix API health check issues

Documentation:
- FEATURES.md - Complete feature overview
- FRONTEND_SETUP.md - Angular 19 setup guide with examples
- SUMMARY.md - Implementation summary

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

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

app/api/artifacts.py

@@ -36,7 +36,7 @@ async def upload_artifact(
     test_suite: Optional[str] = Form(None),
     test_config: Optional[str] = Form(None),
     test_result: Optional[str] = Form(None),
-    metadata: Optional[str] = Form(None),
+    custom_metadata: Optional[str] = Form(None),
     description: Optional[str] = Form(None),
     tags: Optional[str] = Form(None),
     version: Optional[str] = Form(None),
@@ -51,7 +51,7 @@ async def upload_artifact(
     - **test_suite**: Test suite identifier
     - **test_config**: JSON string of test configuration
     - **test_result**: Test result (pass, fail, skip, error)
-    - **metadata**: JSON string of additional metadata
+    - **custom_metadata**: JSON string of additional metadata
     - **description**: Text description of the artifact
     - **tags**: JSON array of tags (as string)
     - **version**: Version identifier
@@ -60,7 +60,7 @@ async def upload_artifact(
     try:
         # Parse JSON fields
         test_config_dict = json.loads(test_config) if test_config else None
-        metadata_dict = json.loads(metadata) if metadata else None
+        metadata_dict = json.loads(custom_metadata) if custom_metadata else None
         tags_list = json.loads(tags) if tags else None
 
         # Generate unique storage path
@@ -88,7 +88,7 @@ async def upload_artifact(
             test_suite=test_suite,
             test_config=test_config_dict,
             test_result=test_result,
-            metadata=metadata_dict,
+            custom_metadata=metadata_dict,
             description=description,
             tags=tags_list,
             version=version,

app/config.py

@@ -3,10 +3,13 @@ from typing import Literal
 
 
 class Settings(BaseSettings):
+    # Deployment mode (feature flag)
+    deployment_mode: Literal["cloud", "air-gapped"] = "air-gapped"
+
     # Database
     database_url: str = "postgresql://user:password@localhost:5432/datalake"
 
-    # Storage Backend
+    # Storage Backend (automatically set based on deployment_mode if not explicitly configured)
     storage_backend: Literal["s3", "minio"] = "minio"
 
     # AWS S3
@@ -31,5 +34,13 @@ class Settings(BaseSettings):
         env_file = ".env"
         case_sensitive = False
 
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        # Auto-configure storage backend based on deployment mode if not explicitly set
+        if self.deployment_mode == "cloud" and self.storage_backend == "minio":
+            self.storage_backend = "s3"
+        elif self.deployment_mode == "air-gapped" and self.storage_backend == "s3":
+            self.storage_backend = "minio"
+
 
 settings = Settings()

app/main.py

@@ -40,6 +40,7 @@ async def startup_event():
     """Initialize database on startup"""
     logger.info("Initializing database...")
     init_db()
+    logger.info(f"Deployment mode: {settings.deployment_mode}")
     logger.info(f"Using storage backend: {settings.storage_backend}")
     logger.info("Application started successfully")
 
@@ -51,6 +52,7 @@ async def root():
         "message": "Test Artifact Data Lake API",
         "version": "1.0.0",
         "docs": "/docs",
+        "deployment_mode": settings.deployment_mode,
         "storage_backend": settings.storage_backend
     }
 

app/models/artifact.py

@@ -22,7 +22,7 @@ class Artifact(Base):
     test_result = Column(String(50), index=True)  # pass, fail, skip, error
 
     # Additional metadata
-    metadata = Column(JSON)
+    custom_metadata = Column(JSON)
     description = Column(Text)
     tags = Column(JSON)  # Array of tags for categorization
 

app/schemas/artifact.py

@@ -8,7 +8,7 @@ class ArtifactCreate(BaseModel):
     test_suite: Optional[str] = None
     test_config: Optional[Dict[str, Any]] = None
     test_result: Optional[str] = None
-    metadata: Optional[Dict[str, Any]] = None
+    custom_metadata: Optional[Dict[str, Any]] = None
     description: Optional[str] = None
     tags: Optional[List[str]] = None
     version: Optional[str] = None
@@ -26,7 +26,7 @@ class ArtifactResponse(BaseModel):
     test_suite: Optional[str] = None
     test_config: Optional[Dict[str, Any]] = None
     test_result: Optional[str] = None
-    metadata: Optional[Dict[str, Any]] = None
+    custom_metadata: Optional[Dict[str, Any]] = None
     description: Optional[str] = None
     tags: Optional[List[str]] = None
     created_at: datetime