Add Reporting Schema for Database Interactions

backend/reporting_schema.sql

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+-- Reporting schema for the application's Postgres database
+-- Generated from current SQLModel models and Alembic migrations
+-- This schema targets the latest state after UUID migration and length adjustments.
+
+-- Enable uuid-ossp for UUID generation if not already present
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+-- Users table
+CREATE TABLE IF NOT EXISTS "user" (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    email VARCHAR(255) NOT NULL,
+    is_active BOOLEAN NOT NULL,
+    is_superuser BOOLEAN NOT NULL,
+    full_name VARCHAR(255),
+    hashed_password TEXT NOT NULL
+);
+
+-- Unique email index (as per Alembic migration)
+CREATE UNIQUE INDEX IF NOT EXISTS ix_user_email ON "user"(email);
+
+-- Items table
+CREATE TABLE IF NOT EXISTS item (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    title VARCHAR(255) NOT NULL,
+    description VARCHAR(255),
+    owner_id UUID NOT NULL
+);
+
+-- Foreign key with cascade delete (as per Alembic migration 1a31ce608336)
+ALTER TABLE item
+    ADD CONSTRAINT item_owner_id_fkey
+    FOREIGN KEY (owner_id) REFERENCES "user"(id)
+    ON DELETE CASCADE;
+
+-- Helpful views for reporting
+
+-- Count of items per user
+CREATE OR REPLACE VIEW reporting_user_item_counts AS
+SELECT
+    u.id AS user_id,
+    u.email,
+    COALESCE(COUNT(i.id), 0) AS item_count
+FROM "user" u
+LEFT JOIN item i ON i.owner_id = u.id
+GROUP BY u.id, u.email
+ORDER BY item_count DESC;
+
+-- Items with owner details
+CREATE OR REPLACE VIEW reporting_items_with_owners AS
+SELECT
+    i.id AS item_id,
+    i.title,
+    i.description,
+    i.owner_id,
+    u.email AS owner_email,
+    u.full_name AS owner_full_name,
+    u.is_active AS owner_is_active
+FROM item i
+JOIN "user" u ON u.id = i.owner_id;
+
+-- Recent items (last 30 days) — requires created_at if available.
+-- NOTE: The current models/migrations do not include timestamps.
+-- If timestamps are added later, you can implement:
+-- CREATE OR REPLACE VIEW reporting_recent_items AS
+-- SELECT * FROM item WHERE created_at >= now() - interval '30 days';