fix: adopt v5.5 result metadata and register missing result groups (#392)

[parthdagia05]

Align result metadata with upstream MUIO v5.5

Align result metadata with upstream MUIO v5.5 as the authoritative source.

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Variables.json fixes

• OV, NONTU, UDCI_d, UDCE_d

  • Filled empty unitRule values with correct definitions

• TEP

  • Changed CapUnitId → milion Currency
  • Reason: cost variable, not capacity

• AEL_d

  • Changed EmiUnit → milion Currency / EmiUnit
  • Reason: shadow price requires composite unit

• EB_d

  • Changed CapUnitId → milion Currency / EmiUnit
  • Renamed to "Energy Balance"

• ROA

  • Added /years divisor to represent rate

• ROPBT, ROUBT

  • Added /years divisor to represent rate units

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Const.Class.js updates

Added missing result groups so they are accessible in Pivot UI:

• Added to:

  • RESULTGROUPNAMES
  • RESULTPARAMORDER
  • RESULTPARAMCOLORS

• New groups:

  • R → Objective Value
  • RYC → Commodity shadow prices
  • RYCn → Constraint shadow prices

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Linked issue

• Closes [Task] Fix result metadata and shadow-price rendering from MUIO v5.5 #392
• Related: [Task] Absorb selected MUIO v5.5 changes on origin/main #388, [Task] Pull the safe backend/runtime changes from MUIO v5.5 #390, [Task] Port the DataFile model/log diagnostics from MUIO v5.5 #391

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Existing related work reviewed

• Reviewed PRs/issues:

  • Add guardrails and smoke harness for MUIO v5.5 pull (#389) #396 (guardrails - different scope)
  • feat: Port safe backend/runtime changes from MUIO v5.5  #397 (backend runtime - no metadata overlap)
  • [v5.5] Guardrails: clean-base verification + stdlib smoke harness #402 (smoke harness - different scope)

• None modify:

  • Variables.json unit rules
  • Const.Class.js result group registration

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Overlap assessment

• Classification: No overlap
• Overlapping items: None

Reason:
No existing PR addresses:

• Incorrect unit rules in Variables.json
• Missing R, RYC, RYCn registrations

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Why this PR should proceed

• Shadow prices (AEL_d, EB_d, UDCI_d, UDCE_d)

  • Currently display incorrect or blank units

• TEP

  • Displays capacity units instead of currency

• Rate variables (ROA, ROPBT, ROUBT)

  • Missing /years, leading to incorrect interpretation

• Result groups (R, RYC, RYCn)

  • Not visible in Pivot UI despite valid data

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Summary

• What changed:

  • Fixed 10 incorrect/empty unit rules in Variables.json
  • Added 3 missing result groups in Const.Class.js

• Why:

  • MUIOGO must align with upstream MUIO v5.5 metadata
  • Ensures correct interpretation of:
    • Shadow prices
    • Cost variables
    • Rate variables

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Validation

• Tests added/updated (not applicable)
• Validation steps documented
• Evidence attached

Validation steps

1. Load the app → open Pivot results page
2. Verify:
   • TEP and NONTU show correct units under RYT
3. Navigate to:
   • RYC, RYE, RYCn groups via selector
4. Confirm:
   • Objective Value (R) shows unit = number
5. Verify:
   • ROA, ROPBT, ROUBT include /years in units

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Documentation

• Docs updated (not applicable - metadata change only)
• No setup/workflow changes required

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Scope check

• No unrelated refactors
• Feature branch used
• No dependency on upstream OSeMOSYS/MUIO
• Base: EAPD-DRB/MUIOGO:main

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Exception rationale

[parthdagia05]

@SeaCelo this PR is ready for a review.