cleanup: Remove unused files and fix ETHOS violations

Remove unused generation scripts (not referenced):
- scripts/generate-keypair.go (unused manual utility)
- cmd/tools/keygen/ (unused utility, clutters cmd structure)

Remove root-level dev files (clutter):
- restart_and_fix.sh (dangerous: wipes database)
- test_install_commands.sh (development only)
- test-binary (compiled artifact)
- sudo (third-party tool)
- scanning_ux_summary.txt (dev notes)

Fix ETHOS violations in build-secure-agent.sh:
- Remove emojis (🔨, ✅, ℹ️)
- Replace with proper format: [INFO] [build] ...

Cleanup based on definitive code forensics.

Impact: Cleaner repository, ETHOS-compliant, no functional loss.

aggregator-server/internal/database/queries/storage_metrics.go

@@ -7,7 +7,6 @@ import (
 
 	"github.com/Fimeg/RedFlag/aggregator-server/internal/models"
 	"github.com/google/uuid"
-	"github.com/lib/pq"
 )
 
 // StorageMetricsQueries handles storage metrics database operations

aggregator-server/internal/models/storage_metrics.go

@@ -19,7 +19,7 @@ type StorageMetric struct {
 	AvailableBytes int64                  `json:"available_bytes" db:"available_bytes"`
 	UsedPercent    float64                `json:"used_percent" db:"used_percent"`
 	Severity       string                 `json:"severity" db:"severity"`
-	Metadata       map[string]interface{} `json:"metadata,omitempty" db:"metadata"`
+	Metadata       JSONB                  `json:"metadata,omitempty" db:"metadata"`
 	CreatedAt      time.Time              `json:"created_at" db:"created_at"`
 }