Initial commit: RouteWatch BGP stream monitor

- Connects to RIPE RIS Live stream to receive real-time BGP updates
- Stores BGP data in SQLite database:
  - ASNs with first/last seen timestamps
  - Prefixes with IPv4/IPv6 classification
  - BGP announcements and withdrawals
  - AS-to-AS peering relationships from AS paths
  - Live routing table tracking active routes
- HTTP server with statistics endpoints
- Metrics tracking with go-metrics
- Custom JSON unmarshaling to handle nested AS sets in paths
- Dependency injection with uber/fx
- Pure Go implementation (no CGO)
- Includes streamdumper utility for debugging raw messages

internal/database/models.go

@@ -0,0 +1,57 @@
+package database
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// ASN represents an Autonomous System Number
+type ASN struct {
+	ID        uuid.UUID `json:"id"`
+	Number    int       `json:"number"`
+	FirstSeen time.Time `json:"first_seen"`
+	LastSeen  time.Time `json:"last_seen"`
+}
+
+// Prefix represents an IP prefix (CIDR block)
+type Prefix struct {
+	ID        uuid.UUID `json:"id"`
+	Prefix    string    `json:"prefix"`
+	IPVersion int       `json:"ip_version"` // 4 or 6
+	FirstSeen time.Time `json:"first_seen"`
+	LastSeen  time.Time `json:"last_seen"`
+}
+
+// Announcement represents a BGP announcement
+type Announcement struct {
+	ID           uuid.UUID `json:"id"`
+	PrefixID     uuid.UUID `json:"prefix_id"`
+	ASNID        uuid.UUID `json:"asn_id"`
+	OriginASNID  uuid.UUID `json:"origin_asn_id"`
+	Path         string    `json:"path"` // JSON-encoded AS path
+	NextHop      string    `json:"next_hop"`
+	Timestamp    time.Time `json:"timestamp"`
+	IsWithdrawal bool      `json:"is_withdrawal"`
+}
+
+// ASNPeering represents a peering relationship between two ASNs
+type ASNPeering struct {
+	ID        uuid.UUID `json:"id"`
+	FromASNID uuid.UUID `json:"from_asn_id"`
+	ToASNID   uuid.UUID `json:"to_asn_id"`
+	FirstSeen time.Time `json:"first_seen"`
+	LastSeen  time.Time `json:"last_seen"`
+}
+
+// LiveRoute represents the current state of a route in the live routing table
+type LiveRoute struct {
+	ID          uuid.UUID  `json:"id"`
+	PrefixID    uuid.UUID  `json:"prefix_id"`
+	OriginASNID uuid.UUID  `json:"origin_asn_id"`
+	PeerASN     int        `json:"peer_asn"`
+	Path        string     `json:"path"`
+	NextHop     string     `json:"next_hop"`
+	AnnouncedAt time.Time  `json:"announced_at"`
+	WithdrawnAt *time.Time `json:"withdrawn_at"`
+}