feat(eibc): add extra info to demand order

[zale144]

Description

---

Closes #873

All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow-up issues.

PR review checkboxes:

I have...

• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• [ ] Targeted PR against the correct branch
• [ ] included the correct type prefix in the PR title
• [ ] Linked to the GitHub issue with discussion and accepted design
• [ ] Targets only one GitHub issue
• [ ] Wrote unit and integration tests
• [ ] Wrote relevant migration scripts if necessary
• [ ] All CI checks have passed
• [ ] Added relevant godoc comments
• [ ] Updated the scripts for local run, e.g genesis_config_commands.sh if the PR changes parameters
• [ ] Add an issue in the e2e-tests repo if necessary

SDK Checklist

• [ ] Import/Export Genesis
• [ ] Registered Invariants
• [ ] Registered Events
• [ ] Updated openapi.yaml
• [ ] No usage of go map
• [ ] No usage of time.Now()
• [ ] Used fixed point arithmetic and not float arithmetic
• [ ] Avoid panicking in Begin/End block as much as possible
• [ ] No unexpected math Overflow
• [ ] Used sendCoin and not SendCoins
• [ ] Out-of-block compute is bounded
• [ ] No serialized ID at the end of store keys
• [ ] UInt to byte conversion should use BigEndian

Full security checklist here

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For Reviewer:

• [ ] Confirmed the correct type prefix in the PR title
• [ ] Reviewers assigned
• [ ] Confirmed all author checklist items have been addressed

---;

After reviewer approval:

• [ ] In case the PR targets the main branch, PR should not be squash merge in order to keep meaningful git history.
• [ ] In case the PR targets a release branch, PR must be rebased.

Summary by CodeRabbit

• New Features
  • Added a new field FulfillerAddress to DemandOrder.
  • FulfillOrder function now sets the FulfillerAddress field.
  • Events related to DemandOrder now include the FulfillerAddress attribute if present.

[coderabbitai[bot]]

Walkthrough

The recent changes introduce a new FulfillerAddress field to the DemandOrder structure, enabling better tracking of order fulfillment events. This enhancement aims to provide additional information for indexing and querying, specifically for the eibc-client’s funds tracking.

Changes

File	Change Summary
CHANGELOG.md	Documented the addition of FulfillerAddress to DemandOrder.
proto/.../demand_order.proto	Added fulfiller_address field to the DemandOrder message.
x/eibc/keeper/keeper.go	Updated FulfillOrder function to set FulfillerAddress of DemandOrder.
x/eibc/types/demand_order.go	Included FulfillerAddress attribute in the events returned by the GetEvents method.
x/eibc/types/types.go	Added AttributeKeyFulfillerAddress constant for event attributes.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant SDK_Context as sdk.Context
    participant Keeper
    participant DemandOrder
    User->>Keeper: FulfillOrder(ctx, order, fulfillerAddress)
    Keeper->>DemandOrder: Set FulfillerAddress(fulfillerAddress.String())
    DemandOrder->>Keeper: Return updated order
    Keeper->>SDK_Context: Emit updated events with FulfillerAddress

Assessment against linked issues

Objective	Addressed	Explanation
Add extra information to eibc order events (#873)	✅
Provide fulfiller address in DemandOrder events (#873)	✅

Poem

🌟 A rabbit’s tale to share today,
The fulfiller’s role in a grand display.
Orders filled with an address so neat,
Tracks all steps, a mighty feat.
With every byte and protocol align,
DemandOrder’s path is so divine. 🌸

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