fix: sanitize derived project ids

[miloquinn]

Summary

Sanitize project IDs derived from local directory names before registering projects in the global config.

Root Cause

Some ao start paths used basename(...) directly as the requested project ID. Directory names such as llama.cpp can contain dots or other characters that do not satisfy the project ID schema, which can cause validation errors during startup/registration.

Fix

Use the existing sanitizeProjectId helper for derived IDs in the local config registration paths, while preserving the original directory name as the human-readable project name/display value.

Impact

Projects in directories like llama.cpp now register cleanly instead of failing validation. Existing readable project names are preserved.

Tests

• corepack pnpm --filter @aoagents/ao-cli test -- start.test.ts
• corepack pnpm --filter @aoagents/ao-cli typecheck

Fixes #1877