docs: Add warnings against customizing deployment templates

[drernie]

Summary

• Add warning in CloudFormation section about not modifying Quilt-provided templates
• Add warning in Terraform section about not modifying Quilt-provided modules and templates
• Clarify that customizations may affect service agreement coverage
• Direct users to contact their account manager for supported customization options

Context

Enterprise customers need to understand that customizing Quilt-provided CloudFormation templates or Terraform modules can negatively impact their service agreement coverage. These warnings provide gentle but clear guidance while offering a path forward through account manager consultation.

🤖 Generated with Claude Code

Greptile Overview

Greptile Summary

Added important warnings in the CloudFormation and Terraform deployment sections to inform enterprise customers that customizing Quilt-provided templates or modules may negatively impact service agreement coverage. The warnings are well-placed, consistent with existing documentation style, and provide a clear path forward through account manager consultation.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk - documentation-only changes with clear messaging
• Score reflects that this is a straightforward documentation update that adds important customer-facing warnings without any code changes, deployment logic modifications, or technical risk
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
docs/Catalog/Installation.md	5/5	Added clear warnings in CloudFormation and Terraform sections about not modifying Quilt-provided templates/modules and directing users to contact account managers for customization needs

Sequence Diagram

sequenceDiagram
    participant User as Enterprise Customer
    participant Docs as Installation Documentation
    participant CF as CloudFormation/Terraform
    participant Support as Quilt Account Manager
    
    User->>Docs: Read deployment instructions
    Docs->>User: Display warning about template modification
    
    alt Customer needs customization
        User->>Support: Contact for customization options
        Support->>User: Provide supported customization path
        User->>CF: Deploy with approved customizations
    else Customer follows standard path
        User->>CF: Deploy with unmodified templates
    end
    
    CF->>User: Deployment complete with full service agreement coverage

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 36.71%. Comparing base (11258ec) to head (fa1998e).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4648   +/-   ##
=======================================
  Coverage   36.71%   36.71%           
=======================================
  Files         865      865           
  Lines       35433    35433           
  Branches     6238     6241    +3     
=======================================
  Hits        13009    13009           
  Misses      21153    21153           
  Partials     1271     1271           

Flag	Coverage Δ
api-python	91.66% <ø> (ø)
catalog	21.82% <ø> (ø)
py-shared	98.18% <ø> (ø)

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[drernie]

Vir was trying to hack our VPCs to share stacks, and were (pleasantly!) surprised when I told them they shouldn't do that, and need to push back on their IT department. We should probably make this official...