This referendum configures the broker and collator selection pallets on the Coretime Chain. It is a follow up to 
[1143](https://polkadot.subsquare.io/referenda/1143) and [1107](https://polkadot.subsquare.io/referenda/1107) and is the last step in the transition of the Polkadot network to Agile Coretime.

It is set to enact at block [22602000](https://polkadot.subscan.io/block/22602000) at the earliest, which falls just after 0900 UTC on 2024-09-19. This is to ensure that it will pass after 1143 even if this is highly backed.

More information about the calls:
The desired candidates and candidacy bond are set to 7 and 1000 DOT respectively to bring them in line with other Polkadot System Parachains.
 
The broker pallet is configured using the following config:
```
{
  advanceNotice: 10
  interludeLength: 50,400
  leadinLength: 100,800
  regionLength: 5,040
  idealBulkProportion: 100.00%
  limitCoresOffered: null
  renewalBump: 3.00%
  contributionTimeout: 5,040
}
```
which is very similar to the configuration on the Kusama Coretime Chain, but with a longer lead-in period (and thus shorter fixed-price period at the end of the sale).

The sales are started with 5 cores on the open market and a target price of 10 DOT. This means that the price at the start of the lead-in period will be 100 DOT, decreasing according to the pricing curve through the lead-in period. This also means that leases ending in this period will be allowed to renew at 100 DOT.

See [`Pallet::dispatch_whitelisted_call_with_preimage`].

- **Problem Statement:** Configuring the broker and collator selection pallets on the Coretime Chain for the transition to Agile Coretime.
- **Significance:** Ensuring alignment with other Polkadot System Parachains and setting parameters for broker pallet configuration.
- **Proposed Solution:** Adjusting candidate requirements and configuring the broker pallet with specific parameters.
- **Expected Outcomes:** Smooth transition to Agile Coretime with updated configurations for broker and collator selection pallets.

#1161 [Whitelisted Caller] Configure the Coretime Chain and start sales

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