feat(migration): added new PostReport model

pkg/database/migrations/006_post_reports.sql

@@ -0,0 +1,30 @@
+-- +migrate Up
+CREATE TYPE ReportType AS ENUM (
+    'duplicate',
+    'missing_data',
+    'rating_abuse'
+    'illegal_content'
+    );
+
+CREATE TYPE ReportState AS ENUM (
+    'pending_unclaimed',
+    'pending',
+    'approved',
+    'partial',
+    'rejected'
+    );
+
+CREATE TABLE "PostReport"
+(
+    id                 CHAR(25)                 NOT NULL PRIMARY KEY,
+    created_at         TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at         TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    deleted_at         TIMESTAMP WITH TIME ZONE NULL,
+    post_id            CHAR(25)                 NOT NULL REFERENCES "Post" (id),
+    report_by          TEXT                     NOT NULL REFERENCES "User" (id),
+    report_description TEXT                     NOT NULL,
+    audit_by           TEXT                     NULL REFERENCES "User" (id),
+    audit_description  TEXT                     NOT NULL,
+    report_type        ReportType               NOT NULL,
+    report_state       ReportState              NOT NULL
+);