[add]: eco routes, services and enums

app/eco/enums/__init__.py

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+from .transaction_type import TransactionType

app/eco/enums/installment_status.py

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+from enum import Enum
+
+class InstallmentStatus(str, Enum):
+    PENDING = 'PENDING'
+    PAID = 'PAID'
+    OVERDUE = 'OVERDUE'
+    PARTIALLY_PAID = 'PARTIALLY_PAID'

app/eco/enums/loan_status.py

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+from enum import Enum
+
+class LoanStatus(str, Enum):
+    PENDING = 'PENDING'
+    ACTIVE = 'ACTIVE'
+    PAID = 'PAID'
+    DEFAULTED = 'DEFAULTED'
+    CLOSED = 'CLOSED'

app/eco/enums/transaction_type.py

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+from enum import Enum
+
+class TransactionType(str, Enum):
+    ELIGIBILITY_CHECK = "eligibility_check"
+    GET_OFFERS = "get_offers"
+    LOAN_INFORMATION = "loan_information"
+    INFLOW_NOTIFICATION = "inflow_notification"
+    LOW_BALANCE_NOTIFICATION = "low_balance_notification"
+    PROVIDE_LOAN = "provide_loan"
+    REPAYMENT = "repayment"