docs(demo): submission-safe gps_denied_recon replay demo (sim-only)

[RMANOV]

Documentation-only. Adds a static, simulation-only reviewer demo for the gps_denied_recon scenario (seed 42001), built from the existing deterministic replay path (scripts/strix_sim_replay.py).

• Doc-only: limited to Project_Docs/demo/DEMO.md and Project_Docs/demo/replay_output.txt. No Rust/Python source, manifest, or test modified — cargo test --workspace and python evidence are unchanged.
• Simulation-only / claim-safe: mandatory caveat banner at top; every figure framed as a prior measured software-replay result to be re-run on the exact submission commit; no hardware/RF/sensor/field-validation/accreditation claim; kinematic replay kept separate from the Rust OODA/ROE/CBF path. Stays within Project_Docs/CAPABILITY_BOUNDARY.md.
• Reproducibility: reviewers are directed to compare the seed-driven scenario/metrics/envelope blocks (checkout-independent) rather than a whole-file SHA (which embeds git metadata and varies per checkout).

Passed the internal claim-wording review gate.

[Copilot]

Pull request overview

Adds a static, reviewer-facing documentation demo for reproducing a deterministic software-only replay of the gps_denied_recon scenario (seed 42001) using the existing scripts/strix_sim_replay.py harness, including a captured output excerpt and a reproducibility checklist.

Changes:

• Add Project_Docs/demo/DEMO.md walkthrough with exact replay command, determinism verification steps, and excerpted evidence blocks.
• Add Project_Docs/demo/replay_output.txt containing a reviewer-friendly excerpt (and derived timeline/table) of the replay evidence.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
Project_Docs/demo/DEMO.md	New reviewer demo doc describing how to reproduce the deterministic replay and what to compare.
Project_Docs/demo/replay_output.txt	New captured/derived excerpt of replay evidence for the gps_denied_recon scenario run.

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