Release v4.104.0

Added

• given caller as <Persona> runs a specification as an authenticated caller built from the persona's policies. When a policy has alternatives, the leftmost one that can be built is used, and hover and MCP show which. The opt-in personas completeness check reports ambiguous personas, personas that gate nothing and gates no persona reaches (#382)
• A specification can run over named case blocks with typed parameter lines, reading values as case.<name>. Each case runs and reports as its own specification, <Specification>_<Case>, in both compilers, the editors, the board, MCP run-specifications and screenplay test --filter (#449)
• The machine-readable Screenplay contract lists persona callers, case tables and their diagnostics