Feature/Enhance Data Structure For LinktaFlow & UserInput

[kinskiwu]

Description

Backend:

• [X] Simplify the LinktaFlow schema to include only essential fields & to optimize data structure
• [X] Remove redundant ID mapping
• [X] Relocate UserInput ID mapping from UserInputController to UserInputService - to adhere to the separation of concerns

Others

• [X] Update API design documentation
• [X] Re-organize type files - separate data model types into separate files

Todo

• [ ] Audit LinktaFlow zustand state on frontend
• [ ] Investigate why save LinktaFlow button not working
• [ ] Audit InputHistory data retrieval performance & decide whether to update the data models for User & UserInput

Fixes #328 #329

Type of change

• [X] 📝 Documentation update
• [X] Other 🗒️ Enhancement

How Can this be tested? Testing Plan to review this PR

• [X] Where in the app does this change take place?
• [X] What are the steps to test this change?
• [X] What is the expected output?
  1. Spin up app at root directory
  2. Click a userInput on the side nav
  3. Click the TensorFlow dev tool icon and you will see the following updated data structures:
  4. LinktaFlow:
  5. InputHistory:

Checklist:

• [X] I have performed a self-review of my own code.
• [ ] I have commented on my code, particularly in hard-to-understand areas.
• [X] I have made corresponding changes to the documentation.
• [X] My changes generate no new warnings.
• [ ] Any dependent changes have been merged and published in downstream modules.
• [X] I have reviewed the Security Best Practices Document.
• [X] I have followed the Naming Conventions Guide for my changes.
• [X] I have ensured that my pull request title is descriptive.

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[colinvandergraaf]

I see you requested review on this, but it's still a draft PR. Is this ready to be reviewed?

[kinskiwu]

@colinvandergraaf Thanks for asking! This pr is not yet ready. I plan on making some changes in a bit. Will convert it to ready when I'm done.

[kinskiwu]

Closing this PR draft as I plan to revisit the design for all data entities as a whole first.