added client RA bill wise download report

app/models/manhole_domestic_chamber_model.py

@@ -0,0 +1,51 @@
+from app import db
+from datetime import datetime
+
+class ManholeDomesticChamber(db.Model):
+    __tablename__ = "manhole_domestic_chamber"
+
+    id = db.Column(db.Integer, primary_key=True)
+    #  Foreign Key to Subcontractor table
+    subcontractor_id = db.Column(db.Integer, db.ForeignKey("subcontractors.id"), nullable=False)
+    # Relationship for easy access (subcontractor.subcontractor_name)
+    subcontractor = db.relationship("Subcontractor", backref="manhole_domestic_chamber_records")
+
+    # Basic Fields
+    Location = db.Column(db.String(500))
+    MH_NO = db.Column(db.String(100))
+    Depth_of_MH = db.Column(db.Float)
+ 
+    # Excavation categories 
+    d_0_to_0_75 = db.Column(db.Float)
+    d_0_76_to_1_05 = db.Column(db.Float)
+    d_1_06_to_1_65 = db.Column(db.Float)
+    d_1_66_to_2_15 = db.Column(db.Float)
+    d_2_16_to_2_65 = db.Column(db.Float)
+    d_2_66_to_3_15 = db.Column(db.Float)
+    d_3_16_to_3_65= db.Column(db.Float)
+    d_3_66_to_4_15 = db.Column(db.Float)
+    d_4_16_to_4_65 = db.Column(db.Float)
+    d_4_66_to_5_15 = db.Column(db.Float)
+    d_5_16_to_5_65 = db.Column(db.Float)
+
+    d_5_66_to_6_15 = db.Column(db.Float)
+    d_6_16_to_6_65 = db.Column(db.Float)
+    d_6_66_to_7_15 = db.Column(db.Float)
+    d_7_16_to_7_65 = db.Column(db.Float)
+    d_7_66_to_8_15 = db.Column(db.Float)
+    d_8_16_to_8_65 = db.Column(db.Float)
+    d_8_66_to_9_15 = db.Column(db.Float)
+    d_9_16_to_9_65 = db.Column(db.Float)
+
+    Domestic_Chambers = db.Column(db.Float)
+    DWC_Pipe_Length = db.Column(db.Float)
+    UPVC_Pipe_Length = db.Column(db.Float)
+    RA_Bill_No=db.Column(db.String(500))
+
+    created_at = db.Column(db.DateTime, default=datetime.today)
+
+    def __repr__(self):
+        return f"<HanholeDomesticChamberConstruction {self.Location}>"
+
+    def serialize(self):
+        return {c.name: getattr(self, c.name) for c in self.__table__.columns}