TP-52454 : Created Zenduty integration (#348)

* TP-52454| created zenduty integration

* TP-52454| added migration script for external team table

* TP-52454| added extra logs

* TP-52454| modified logs

* TP-52454|added extra logs

* TP-52454| changed post url for zenduty

* TP-52454| fixed bugs in zenduty client

* TP-52454| created constants for environmental varibales

* TP-52454| enabled zenduty if severity is less than or equal to the defined config

db/migration/000011_add_external_team_schema.up.sql

@@ -0,0 +1,14 @@
+CREATE TABLE IF NOT EXISTS external_team
+(
+    id                 SERIAL PRIMARY KEY,
+    external_team_id   character varying,
+    external_team_name character varying(100) NOT NULL,
+    metadata           jsonb,
+    provider_name      character varying(50)  NOT NULL,
+    team_id            INTEGER                NOT NULL REFERENCES team (id),
+    is_active          BOOLEAN                     DEFAULT true,
+    created_at         timestamp without time zone DEFAULT CURRENT_TIMESTAMP,
+    updated_at         timestamp without time zone DEFAULT CURRENT_TIMESTAMP,
+    created_by         character varying(100),
+    updated_by         character varying(100)
+);