feat: Document completed tasks for KMS, Cryptography, and Plugin Libraries

- Added detailed task completion records for KMS interface implementation and CLI support for file-based keys.
- Documented security enhancements including Argon2id password hashing, audit event contracts, and rate limiting configurations.
- Included scoped service support and integration updates for the Plugin platform, ensuring proper DI handling and testing coverage.

ops/devops/telemetry/validate_storage_stack.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+"""
+Static validation for the telemetry storage stack configuration.
+
+Checks the Prometheus, Tempo, and Loki configuration snippets to ensure:
+- mutual TLS is enabled end-to-end
+- tenant override files are referenced
+- multitenancy flags are set
+- retention/limit defaults exist for __default__ tenant entries
+
+This script is intended to back `DEVOPS-OBS-50-002` and can run in CI
+before publishing bundles or rolling out staging updates.
+"""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+PROMETHEUS_PATH = REPO_ROOT / "deploy/telemetry/storage/prometheus.yaml"
+TEMPO_PATH = REPO_ROOT / "deploy/telemetry/storage/tempo.yaml"
+LOKI_PATH = REPO_ROOT / "deploy/telemetry/storage/loki.yaml"
+TEMPO_OVERRIDES_PATH = REPO_ROOT / "deploy/telemetry/storage/tenants/tempo-overrides.yaml"
+LOKI_OVERRIDES_PATH = REPO_ROOT / "deploy/telemetry/storage/tenants/loki-overrides.yaml"
+
+
+def read(path: Path) -> str:
+    if not path.exists():
+        raise FileNotFoundError(f"Required configuration file missing: {path}")
+    return path.read_text(encoding="utf-8")
+
+
+def assert_contains(haystack: str, needle: str, path: Path) -> None:
+    if needle not in haystack:
+        raise AssertionError(f"{path} is missing required snippet: {needle!r}")
+
+
+def validate_prometheus() -> None:
+    content = read(PROMETHEUS_PATH)
+    assert_contains(content, "tls_config:", PROMETHEUS_PATH)
+    assert_contains(content, "ca_file:", PROMETHEUS_PATH)
+    assert_contains(content, "cert_file:", PROMETHEUS_PATH)
+    assert_contains(content, "key_file:", PROMETHEUS_PATH)
+    assert_contains(content, "authorization:", PROMETHEUS_PATH)
+    assert_contains(content, "credentials_file:", PROMETHEUS_PATH)
+
+
+def validate_tempo() -> None:
+    content = read(TEMPO_PATH)
+    assert_contains(content, "multitenancy_enabled: true", TEMPO_PATH)
+    assert_contains(content, "require_client_cert: true", TEMPO_PATH)
+    assert_contains(content, "per_tenant_override_config", TEMPO_PATH)
+    overrides = read(TEMPO_OVERRIDES_PATH)
+    assert_contains(overrides, "__default__", TEMPO_OVERRIDES_PATH)
+    assert_contains(overrides, "traces_per_second_limit", TEMPO_OVERRIDES_PATH)
+    assert_contains(overrides, "max_bytes_per_trace", TEMPO_OVERRIDES_PATH)
+
+
+def validate_loki() -> None:
+    content = read(LOKI_PATH)
+    assert_contains(content, "auth_enabled: true", LOKI_PATH)
+    assert_contains(content, "per_tenant_override_config", LOKI_PATH)
+    overrides = read(LOKI_OVERRIDES_PATH)
+    assert_contains(overrides, "__default__", LOKI_OVERRIDES_PATH)
+    assert_contains(overrides, "retention_period", LOKI_OVERRIDES_PATH)
+
+
+def main() -> int:
+    try:
+        validate_prometheus()
+        validate_tempo()
+        validate_loki()
+    except (AssertionError, FileNotFoundError) as exc:
+        print(f"[❌] telemetry storage validation failed: {exc}", file=sys.stderr)
+        return 1
+
+    print("[✓] telemetry storage configuration meets multi-tenant guard rails.")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())