feat(api): 新增復原演練批准包模板

apps/api/src/services/backup_restore_drill_approval_package_template.py

@@ -0,0 +1,145 @@
+"""
+Backup / DR restore drill approval package template snapshot.
+
+Loads the latest committed, read-only approval package template for restore
+drills, credential escrow review, K8s resource recovery, observability
+recovery, and route reconstruction. The template never runs backups, restores,
+offsite sync, credential marker writes, schedule changes, workflow writes,
+Telegram test notifications, destructive prune, secret plaintext export, paid
+API calls, shadow/canary, or production routing changes.
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+from src.services.snapshot_paths import default_evaluations_dir
+
+_DEFAULT_EVALUATIONS_DIR = default_evaluations_dir(Path(__file__))
+_SNAPSHOT_PATTERN = "backup_restore_drill_approval_package_template_*.json"
+_SCHEMA_VERSION = "backup_restore_drill_approval_package_template_v1"
+
+
+def load_latest_backup_restore_drill_approval_package_template(
+    evaluations_dir: Path | None = None,
+) -> dict[str, Any]:
+    """Load the newest committed Backup / DR restore drill approval package template."""
+    directory = evaluations_dir or _DEFAULT_EVALUATIONS_DIR
+    candidates = sorted(directory.glob(_SNAPSHOT_PATTERN))
+    if not candidates:
+        raise FileNotFoundError(
+            f"no Backup / DR restore drill approval package template snapshots found in {directory}"
+        )
+
+    latest = candidates[-1]
+    with latest.open(encoding="utf-8") as handle:
+        payload = json.load(handle)
+
+    if not isinstance(payload, dict):
+        raise ValueError(f"{latest}: expected JSON object")
+    _require_schema(payload, _SCHEMA_VERSION, str(latest))
+    _require_read_only_boundaries(payload, str(latest))
+    _require_operation_boundaries(payload, str(latest))
+    _require_rollup_consistency(payload, str(latest))
+    return payload
+
+
+def _require_schema(payload: dict[str, Any], expected: str, label: str) -> None:
+    actual = payload.get("schema_version")
+    if actual != expected:
+        raise ValueError(f"{label}: expected schema_version={expected}, got {actual!r}")
+
+
+def _require_read_only_boundaries(payload: dict[str, Any], label: str) -> None:
+    program_status = payload.get("program_status") or {}
+    if program_status.get("read_only_mode") is not True:
+        raise ValueError(f"{label}: program_status.read_only_mode must be true")
+
+    boundaries = payload.get("approval_boundaries") or {}
+    blocked_flags = {
+        "sdk_installation_allowed",
+        "paid_api_call_allowed",
+        "shadow_or_canary_allowed",
+        "production_routing_allowed",
+        "destructive_operation_allowed",
+        "restore_execution_allowed",
+        "offsite_sync_execution_allowed",
+        "credential_marker_write_allowed",
+    }
+    allowed = sorted(flag for flag in blocked_flags if boundaries.get(flag) is not False)
+    if allowed:
+        raise ValueError(f"{label}: approval boundaries must remain false: {allowed}")
+
+
+def _require_operation_boundaries(payload: dict[str, Any], label: str) -> None:
+    boundaries = payload.get("operation_boundaries") or {}
+    if boundaries.get("read_only_template_allowed") is not True:
+        raise ValueError(f"{label}: read_only_template_allowed must be true")
+
+    blocked_flags = {
+        "backup_execution_allowed",
+        "restore_execution_allowed",
+        "offsite_sync_execution_allowed",
+        "credential_marker_write_allowed",
+        "schedule_change_allowed",
+        "workflow_write_allowed",
+        "telegram_test_notification_allowed",
+        "destructive_prune_allowed",
+        "secret_plaintext_allowed",
+        "production_routing_allowed",
+        "sdk_installation_allowed",
+        "paid_api_call_allowed",
+        "shadow_or_canary_allowed",
+    }
+    allowed = sorted(flag for flag in blocked_flags if boundaries.get(flag) is not False)
+    if allowed:
+        raise ValueError(f"{label}: operation boundaries must remain false: {allowed}")
+
+
+def _require_rollup_consistency(payload: dict[str, Any], label: str) -> None:
+    templates = payload.get("package_templates") or []
+    rollups = payload.get("rollups") or {}
+    if rollups.get("total_templates") != len(templates):
+        raise ValueError(f"{label}: rollups.total_templates must match package_templates")
+
+    ready_ids = {
+        template.get("template_id")
+        for template in templates
+        if template.get("status") == "template_ready"
+    }
+    if set(rollups.get("template_ready_ids") or []) != ready_ids:
+        raise ValueError(f"{label}: rollups.template_ready_ids must match template_ready templates")
+
+    hitl_ids = {
+        template.get("template_id")
+        for template in templates
+        if "HITL approval" in (template.get("manual_approvals") or [])
+    }
+    if set(rollups.get("hitl_required_template_ids") or []) != hitl_ids:
+        raise ValueError(f"{label}: rollups.hitl_required_template_ids must match HITL templates")
+
+    blocked_target_ids = _target_ids_by_readiness(templates, "blocked")
+    if set(rollups.get("blocked_source_target_ids") or []) != blocked_target_ids:
+        raise ValueError(
+            f"{label}: rollups.blocked_source_target_ids must match blocked source targets"
+        )
+
+    action_required_target_ids = _target_ids_by_readiness(templates, "action_required")
+    if set(rollups.get("action_required_source_target_ids") or []) != action_required_target_ids:
+        raise ValueError(
+            f"{label}: rollups.action_required_source_target_ids must match action_required source targets"
+        )
+
+    if (payload.get("decision_gate_contract") or {}).get("hitl_required") is not True:
+        raise ValueError(f"{label}: decision_gate_contract.hitl_required must be true")
+
+
+def _target_ids_by_readiness(templates: list[dict[str, Any]], readiness: str) -> set[str]:
+    return {
+        target.get("target_id")
+        for template in templates
+        for target in template.get("source_target_statuses", [])
+        if target.get("readiness") == readiness
+    }