Full serde-derived struct tree covering every block in plan §4 (MiroirConfig,
NodeConfig, TaskStoreConfig, AdminConfig, HealthConfig, ScatterConfig,
RebalancerConfig, ServerConfig, ConnectionPoolConfig, TaskRegistryConfig) and
all 21 §13 advanced-capability sub-structs (ReshardingConfig through
SearchUiConfig with nested auth/rate-limit/CSP/analytics structs), plus §14
horizontal-scaling structs (PeerDiscoveryConfig, LeaderElectionConfig, HpaConfig).
Includes:
- Layered loading via config crate: built-in defaults → file → env overrides
- Config::validate() with 14 cross-field rules (HA requires redis, scoped_key
timing inversion, node group bounds, tenant affinity range checks, etc.)
- 10 unit tests: round-trip YAML, full plan example, minimal YAML defaults,
and validation rejection cases
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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