docs: replace internal build-process vocabulary with plain language master
Public design records now describe sequenced work as numbered phases and individual units of work as changes. Recorded gate evidence names the make target that was run, dropping an internal wrapper no outside reader can invoke; PASS/FAIL verdicts and output are unchanged. Search-evidence rows in docs/design/native-sol-client/00-prep-findings.md now describe the searches performed rather than quoting command lines that named internal tooling paths and branches. The findings and verdicts are unchanged, and no search was reworded into one that was not actually run. Review addressees are named by role. No design content, decision, constraint, non-goal, or superseded notice was added, removed, or reversed. Every changed line replaces vocabulary in place. docs/openapi/** is untouched; its generated entity-network phrase originates in solstone/apps/entities/contract.py and is not internal vocabulary.