chore: normalize root demo filename

[CoreyLeath-code]

Summary

Normalizes one malformed root Python filename and hardens environment-file ignore coverage.

Files changed

File	Change and reason
demo.app.py	Removed after rename; dots inside a module basename are not a conventional/importable Python module name.
demo_app.py	New canonical filename; content is preserved exactly.
.gitignore	Adds .env.* while preserving an explicit !.env.example exception, covering local, development, and production environment variants.

Validation performed

• Searched README, documentation, source, workflows, Docker, scripts, and tests for demo.app.py and demo_app.py; no repository reference requires an update.
• Confirmed no root release.yml, File Structure, codeofconduct, or css candidate exists.
• Confirmed .gitignore now covers .env and .env.*.
• Did not read, modify, relocate, or expose credential-shaped files.
• Repository workflows are triggered for this PR.

Risks

• External, undocumented commands that invoke streamlit run demo.app.py must switch to streamlit run demo_app.py.

Follow-up recommendations

• If the Streamlit demonstration becomes a supported component, add a documented launch command and its isolated dependency set.

Summary by CodeRabbit

• New Features
  • Added a Streamlit dashboard for monitoring simulated live log activity.
  • Classifies log messages by severity and displays recent records with key metrics.
  • Supports subsystem filtering, ingestion controls, configurable refresh intervals, and anomaly injection for testing.
  • Retains up to 100 recent log entries and optionally visualizes subsystem distribution.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: b8da16ad-8c7f-4118-83b2-0274ed750aaf

📥 Commits

Reviewing files that changed from the base of the PR and between 4ac72a6 and b6a13b3.

📒 Files selected for processing (2)

• .gitignore
• demo_app.py

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📝 Walkthrough

Walkthrough

The change adds a Streamlit dashboard that simulates, classifies, stores, and displays log records. It adds configurable ingestion controls and polling. It also ignores environment-specific files while retaining .env.example.

Changes

Streamlit log dashboard

Layer / File(s)	Summary
Dashboard setup and log classification demo_app.py	Adds Streamlit configuration, sidebar controls, session state, and analyze_log_line severity classification.
Live log ingestion and retention demo_app.py	Generates log messages, records classifications with timestamps, retains up to 100 records, and reruns at the selected interval.
Metrics and log visualization demo_app.py	Displays stream metrics, a severity-styled log ledger, subsystem distribution data, and an empty state.

Environment file tracking rules

Layer / File(s)	Summary
Environment file ignore rules .gitignore	Ignores .env.* files and explicitly allows .env.example.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Operator
  participant StreamlitDashboard
  participant analyze_log_line
  participant SessionState
  Operator->>StreamlitDashboard: Configure subsystem and ingestion controls
  StreamlitDashboard->>analyze_log_line: Classify generated log message
  analyze_log_line-->>StreamlitDashboard: Return severity and classification
  StreamlitDashboard->>SessionState: Store timestamped record
  StreamlitDashboard->>StreamlitDashboard: Render metrics and log data
  StreamlitDashboard->>StreamlitDashboard: Rerun after selected interval

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/root-hygiene

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