perf(cli): bypass command imports for exact version

[doublewhy]

Plain-language summary

• Context: Package managers, deployment checks, and operators often run raes --version only to identify the installed release.
• Problem: That simple request imported every CLI command and much of the compiler, solver, and conformance stack. On the measured reference machine it consumed about 1.1 seconds before printing one line.
• Fix: Add a tiny console entry point that handles only the exact --version and -V argument forms from installed package metadata, then delegates every other invocation to the existing Typer application unchanged.

Issue closed

Closes #1111

What changed

• Routes the raes console script through a narrow entry point.
• Preserves installed-distribution metadata as the only version source.
• Preserves the existing honest unknown fallback when package metadata is unavailable.
• Leaves --help, subcommands, mixed arguments, and direct Typer invocation on the existing code path.
• Adds source-tree and installed-wheel startup checks with relative and absolute performance budgets.

Verification

• Focused CLI, packaging, and version tests: 53 passed, 19 deselected.
• Installed/startup integration check: 1 passed.
• Entry point and CLI main coverage: 33/33 statements, 4/4 branches.
• Ruff and repository policy pass.
• Rebuilt on current dev at 3d6e369b726607ff657a841c7f1dee0bec655b8f.

Scope

This intentionally optimizes only exact version requests. Lazy-loading the full help/command tree and changing schema-bundle copy semantics are separate, more invasive performance projects.