tarantool / go-config / 22740617086

Pull #21

github

tarantool: add builder for tarantool config assembly

Add the tarantool package with a Builder pattern for assembling
Tarantool-compatible configuration from multiple sources.

- Support config file, config directory, centralized storage, and
  environment variables.
- Process sources in priority order:
  default-env < file/dir < storage < env.
- Support inheritance: Global → groups → replicasets → instances
  with MergeDeep for credentials, MergeAppend for roles, and
  NoInherit for leader.
- Validate configuration against JSON Schema (fetched from
  download.tarantool.org or provided).
- Allow runtime mutation with BuildMutable.
- Add NewKeyPathFromSegments to create KeyPath from a slice of
  segments.
- Fix env collector to skip emitting empty tree when no environment
  variables match, avoiding overwriting of existing values during
  merge.

693 of 1027 new or added lines in 19 files covered. (67.48%)

2627 of 3091 relevant lines covered (84.99%)

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