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/scenarios.go

@@ -0,0 +1,64 @@
+package birdfmt
+
+import (
+	"embed"
+	"io/fs"
+	"path"
+	"sort"
+)
+
+//go:embed testdata/scenarios
+var scenariosFS embed.FS
+
+// BirdScenarioPaths returns POSIX-style directory paths (under testdata/scenarios)
+// that contain a bird.conf file, sorted for stable iteration.
+func BirdScenarioPaths() ([]string, error) {
+	var dirs []string
+	err := fs.WalkDir(scenariosFS, "testdata/scenarios", func(p string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.IsDir() || d.Name() != "bird.conf" {
+			return nil
+		}
+		dir := path.Dir(p)
+		if dir == "testdata/scenarios" {
+			return nil
+		}
+		dirs = append(dirs, dir)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	sort.Strings(dirs)
+	return dirs, nil
+}
+
+// ScenarioBirdConfRel returns the path relative to module root internal/birdfmt/ for bird.conf.
+func ScenarioBirdConfRel(scenarioDir string) string {
+	return path.Join(scenarioDir, "bird.conf")
+}
+
+// ReadScenarioBirdConf returns the contents of bird.conf for a scenario directory from embed.
+func ReadScenarioBirdConf(scenarioDir string) ([]byte, error) {
+	return scenariosFS.ReadFile(path.Join(scenarioDir, "bird.conf"))
+}
+
+// RepoRelativeBirdConf is the path from the repository root (for CI / docker bind mounts).
+func RepoRelativeBirdConf(scenarioDir string) string {
+	return path.Join("internal/birdfmt", scenarioDir, "bird.conf")
+}
+
+// AllScenarioNames returns leaf scenario names (last path segment) for tables / docs.
+func AllScenarioNames() ([]string, error) {
+	paths, err := BirdScenarioPaths()
+	if err != nil {
+		return nil, err
+	}
+	names := make([]string, len(paths))
+	for i, p := range paths {
+		names[i] = path.Base(p)
+	}
+	return names, nil
+}