Release 0.0.6

[m1ngsama]

What changed

• prepare the 0.0.6 version and release notes
• normalize enhanced terminal keyboard case and modifier reporting
• tighten session-log alias checks and add deterministic cross-filesystem mutation tests
• update the pinned Crossterm revision with bounded zero-coordinate parsing
• add a pinned weekly and per-change Cargo.lock audit workflow
• make the reusable terminal test work under low file-descriptor limits

Why

This collects the post-0.0.5 hardening work into the next patch milestone and closes compatibility issues found during release validation on macOS and Linux.

Validation

• Rust 1.97.1 fmt, strict clippy, all-target tests, release overflow checks, strict rustdoc
• Rust 1.88.0 strict clippy, all-target tests, package verification
• make bounded-results
• make distcheck
• Cargo.lock advisory audit
• real Linux and macOS PTY and signal coverage, including low descriptor limits