feat: provider audit — builder support, function tuning, source archive

Аудит провайдера vs каноничный Fission. Добавлено:

Environment:
- builder_image, builder_command для Go и языков с build step

Package:
- deploy_type (literal/source) для переключения deployment/source archive
- loadPackageSourceArchive() — zip-упаковка source_dir
- Убран пустой source:{} из literal mode

Function:
- executor_type (poolmgr/newdeploy/container)
- function_timeout, idle_timeout
- min_scale, max_scale для ExecutionStrategy

Все 21 тест пройден. Обратная совместимость проверена.
Документация: doc/AUDIT_PROVIDER_VS_FISSION_2026-06-03.md

examples/invalid-manifest/code/main.py

@@ -0,0 +1,2 @@
+def main():
+    return "test"

examples/invalid-manifest/main.tf

@@ -0,0 +1,33 @@
+terraform {
+  required_providers {
+    fission = {
+      source  = "nail/fission"
+      version = "~> 0.1.0"
+    }
+  }
+}
+
+provider "fission" {
+  kubeconfig_path = "/home/naeel/.kube/config"
+  namespace       = "default"
+}
+
+# Missing image — should fail
+resource "fission_environment" "bad_env" {
+  name    = "tf-invalid-env"
+  # image   = "..."  # MISSING REQUIRED FIELD
+  version = 3
+}
+
+resource "fission_package" "pkg" {
+  name        = "tf-invalid-pkg"
+  environment = fission_environment.bad_env.name
+  source_dir  = "${path.module}/code"
+}
+
+resource "fission_function" "fn" {
+  name         = "tf-invalid-fn"
+  environment  = fission_environment.bad_env.name
+  package_name = fission_package.pkg.name
+  entrypoint   = "main.main"
+}