fix: clean up visualizer SVG, remove wrong screenshots and instructor guide

[gamaware]

Fix replication line, remove lab09 screenshots showing wrong stack name, remove instructor guide.

Summary by CodeRabbit

• Documentation

  • Removed instructor guide for Lab 09 distributed file systems.
  • Removed embedded setup screenshots from Lab 10 database visualizer documentation while retaining instructional steps.

• Style

  • Updated database visualizer replication connection display with directional arrow indicator for improved clarity.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

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Run ID: 3212c359-31cf-433d-934b-19eb2f7b30fa

📥 Commits

Reviewing files that changed from the base of the PR and between 4c64e3f and 55b2a9d.

⛔ Files ignored due to path filters (7)

• 10-databases/visualizer/screenshots/02-aws-academy-modules.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/03-learner-lab-toolbar.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/04-aws-details-panel.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/06-cfn-create-stack.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/08-cfn-stack-name.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/10-cfn-creating.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png
• 10-databases/visualizer/screenshots/11-cfn-outputs.png is excluded by !**/*.png, !**/screenshots/**, !**/*.png

📒 Files selected for processing (3)

• 09-distributed-file-systems/INSTRUCTOR-GUIDE.md
• 10-databases/visualizer/LAB-VISUALIZER.md
• 10-databases/visualizer/index.html

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📝 Walkthrough

Walkthrough

The pull request removes the complete instructor guide for the distributed file systems lab (682 lines), trims embedded screenshots from database visualizer documentation to streamline content, and refines SVG styling for the replication line visualization by replacing a labeled dashed line with a styled arrow.

Changes

Cohort / File(s)	Summary
Documentation Cleanup 09-distributed-file-systems/INSTRUCTOR-GUIDE.md	Removed entire instructor guide containing lab flow, timing, delivery guidance, demos, and Q&A content.
Visualizer Documentation 10-databases/visualizer/LAB-VISUALIZER.md	Removed embedded screenshot image references from AWS Academy setup instructions; retained instructional text and tightened formatting.
Visualization Enhancement 10-databases/visualizer/index.html	Replaced static dashed replication line with styled arrow; adjusted stroke properties, positioning, and added marker-end attribute for arrowhead rendering.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• feat: add instructor guide for Lab 09 with progressive diagrams #39 — Adds the 09-distributed-file-systems/INSTRUCTOR-GUIDE.md file that is deleted in this PR (inverse/opposing change).

Poem

🐰 ✨ Out with old guides, in with the clean,
Screenshots fade from the visualization scene,
Arrows now dance where dashes once played,
A sleeker design, both bold and well-made!

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/lab10-cleanup

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Copilot]

Pull request overview

This PR updates the Lab 10 database visualizer materials by correcting the replication indicator in the SVG diagram, removing screenshots that showed an incorrect CloudFormation stack name, and removing the Lab 09 instructor guide document.

Changes:

• Adjust the replication indicator in the visualizer SVG (use a dashed replication arrow below the main connection line).
• Remove screenshot embeds from the Lab 10 visualizer instructions and delete the associated (incorrect) screenshot assets.
• Remove 09-distributed-file-systems/INSTRUCTOR-GUIDE.md.

Reviewed changes

Copilot reviewed 3 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
10-databases/visualizer/index.html	Updates the replication line rendering to a dashed arrow with the existing SVG marker definition.
10-databases/visualizer/LAB-VISUALIZER.md	Removes outdated screenshot references from the CloudFormation setup instructions.
10-databases/visualizer/screenshots/02-aws-academy-modules.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/03-learner-lab-toolbar.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/04-aws-details-panel.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/06-cfn-create-stack.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/08-cfn-stack-name.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/10-cfn-creating.png	Removed outdated screenshot asset.
10-databases/visualizer/screenshots/11-cfn-outputs.png	Removed outdated screenshot asset.
09-distributed-file-systems/INSTRUCTOR-GUIDE.md	Removes the instructor guide document from the repo.