docs: enhance EvoBGP architecture plan with new risk mitigation strategies, testing matrix for BIRD2, and CI/CD workflow details. Updated section titles for clarity and added completed todos for deployment practices.

internal/birdfmt/static.go

@@ -0,0 +1,39 @@
+package birdfmt
+
+import (
+	"net/netip"
+	"sort"
+	"strings"
+)
+
+// RenderStaticIPv4Protocol renders a BIRD 2 `protocol static` block for IPv4 prefixes.
+// Prefixes are sorted for stable output (golden tests, reproducible rev).
+func RenderStaticIPv4Protocol(protocolName string, prefixes []netip.Prefix) string {
+	if protocolName == "" {
+		protocolName = "evobgp_static_v4"
+	}
+	uniq := make(map[string]netip.Prefix)
+	for _, p := range prefixes {
+		if !p.Addr().Is4() {
+			continue
+		}
+		uniq[p.String()] = p.Masked()
+	}
+	keys := make([]string, 0, len(uniq))
+	for k := range uniq {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	var b strings.Builder
+	b.WriteString("protocol static ")
+	b.WriteString(protocolName)
+	b.WriteString(" {\n    ipv4;\n")
+	for _, k := range keys {
+		b.WriteString("    route ")
+		b.WriteString(k)
+		b.WriteString(" unreachable;\n")
+	}
+	b.WriteString("}\n")
+	return b.String()
+}