Bug: [BUG] Newly created business profile takes the value of `routing_algorithm` from the `merchant_account.routing_algorithm` column



### Bug Description

When creating a new business profile, the value of `routing_algorithm` is taken from the merchant account's `routing_algorithm` field which may contain some stale data.

### Expected Behavior

The value of the `routing_algorithm` in a newly created business profile should be a default value and not taken from anywhere.

### Actual Behavior

The value of `routing_algorithm` is taken from the merchant account.

### Steps To Reproduce

-

### Context For The Bug

-

### Environment

Integ

### Have you spent some time checking if this bug has been raised before?

- [X] I checked and didn't find a similar issue

### Have you read the Contributing Guidelines?

- [X] I have read the [Contributing Guidelines](https://github.com/juspay/hyperswitch/blob/main/docs/CONTRIBUTING.md)

### Are you willing to submit a PR?

Yes, I am willing to submit a PR!
diff --git a/crates/router/src/types/api/admin.rs b/crates/router/src/types/api/admin.rs
index 6bbe9149f4d..fe99d084223 100644
--- a/crates/router/src/types/api/admin.rs
+++ b/crates/router/src/types/api/admin.rs
@@ -124,9 +124,10 @@ impl ForeignTryFrom<(domain::MerchantAccount, BusinessProfileCreate)>
                 .unwrap_or(merchant_account.redirect_to_merchant_with_http_post),
             webhook_details: webhook_details.or(merchant_account.webhook_details),
             metadata: request.metadata,
-            routing_algorithm: request
-                .routing_algorithm
-                .or(merchant_account.routing_algorithm),
+            routing_algorithm: Some(serde_json::json!({
+                "algorithm_id": null,
+                "timestamp": 0
+            })),
             intent_fulfillment_time: request
                 .intent_fulfillment_time
                 .map(i64::from)

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
This PR updates the code to set the value of the `business_profile.routing_algorithm` column to a default value during creation of business profile in DB.


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->
Currently, the value of the `business_profile.routing_algorithm` field is optionally taken from the request or the merchant account, but there is no case where we want the value to be anything other than the default value.

## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
Local, compiler-guided

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible
- [ ] I added a [CHANGELOG](/CHANGELOG.md) entry if applicable
