feat: modelos y CRUD para unit_tests y e2e_tests

UnitTest en registry con Insert, GetByFunction, Search FTS5, Purge. E2ETest en fn_operations con Insert, Get, List, UpdateResult, Delete. Ambos con scan helpers y serialización JSON.

fn_operations/models.go

@@ -167,6 +167,33 @@ type Log struct {
 	CreatedAt   time.Time      `json:"created_at"`
 }
 
+// E2ETestStatus represents the result of an e2e test run.
+type E2ETestStatus string
+
+const (
+	E2EPass    E2ETestStatus = "pass"
+	E2EFail    E2ETestStatus = "fail"
+	E2ESkip    E2ETestStatus = "skip"
+	E2EPending E2ETestStatus = ""
+)
+
+// E2ETest is an integration test that verifies function composition within an app.
+type E2ETest struct {
+	ID           string         `json:"id"`
+	Name         string         `json:"name"`
+	Description  string         `json:"description"`
+	RelationID   string         `json:"relation_id"`
+	Steps        []string       `json:"steps"`
+	InputFixture map[string]any `json:"input_fixture"`
+	Expected     map[string]any `json:"expected"`
+	LastStatus   E2ETestStatus  `json:"last_status"`
+	LastRunAt    string         `json:"last_run_at"`
+	ExecutionID  string         `json:"execution_id"`
+	DurationMs   int64          `json:"duration_ms"`
+	CreatedAt    time.Time      `json:"created_at"`
+	UpdatedAt    time.Time      `json:"updated_at"`
+}
+
 // TypeSnapshot is an immutable copy of a registry type at point of use.
 type TypeSnapshot struct {
 	ID          string    `json:"id"`