Creates a new leasing contract for an asset, setting up rental terms, dates, and financial parameters.

A leasing contract must be associated with an existing asset.
You can associate multiple tenants and guarantors with the contract by providing arrays of profile IDs.

Profile Association Options:

• Use tenant_ids to associate multiple tenants with the contract
• Use guarantor_ids to associate multiple guarantors with the contract

Provide these arrays of profile public IDs in the JSON body, either at the root
or inside the leasing_contract object.

Quarter Revision Index:
Use quarter_revision_index_attributes with quarter, nature, and year to lookup the index from the database.
This provides a convenient way to reference the correct revision index without needing to know the internal ID.

Valeur initiale du bail (signing revision index):
Use signing_quarter_revision_index_id with a revision index public ID to set the base value used for
rent indexation. When omitted, it defaults to the same value as quarter_revision_index.

The contract will go through various lifecycle stages from creation to closing,
with financial transactions tracked at each stage.

Tacit Renewal:
Set the tacit renewal duration using tacit_renewal_duration_years:

• nil or omit: No tacit renewal
• 1, 3, 6, or 9: Specific duration in years
• -1: Unlimited renewal

You can set a custom unpaid_threshold_amount_in_cents to override the customer's default value
for unpaid rent alerts for this specific contract.

VAT (TVA):

• Use vat_applicable to enable VAT on the contract
• Provide vat_rate when VAT is applicable (allowed decimals, e.g., 5.5, 10, 20)

Rent Indexation:
The indexation_enabled field controls whether IRL (Indice de Référence des Loyers) rent indexation
is activated for this contract. When set to true (default), the contract will be eligible
for automatic annual rent indexation based on the IRL index. The indexation also requires
a valid quarter_revision_index to be set.

Revision Frequency:
Use revision_frequency_in_years to set the rent revision frequency:

• 1: Annual revision (default)
• 3: Triennial revision (for commercial leases)

First Call Only:
Set first_call_only to true when only managing the move-in (mise en location).
Only the first rent call will be generated, with no recurring billing lines.
Mutually exclusive with rental_transfer.