Build the Solaire inventory intelligence MVP

Add the tenant-ready dashboard, freshness and pricing analytics, mock integration adapters, persistence schema, and verification tooling needed for the initial pilot.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

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+# The demo UI works without PostgreSQL. Set this for migrations and persistence.
+DATABASE_URL=postgres://solaire:solaire@localhost:5432/solaire
+
+# Set to true to require the seeded pilot login.
+REQUIRE_AUTH=false
+SESSION_SECRET=replace-with-at-least-32-random-characters
+DEMO_USER_EMAIL=demo@solaire.app
+DEMO_USER_PASSWORD=solaire-demo
+
+# Future Odoo connection (API access requires an eligible Odoo plan).
+ODOO_BASE_URL=
+ODOO_DATABASE=
+ODOO_API_KEY=
+ODOO_API_MODE=json2
+
+# Future Salesforce External Client App connection.
+SALESFORCE_INSTANCE_URL=
+SALESFORCE_CLIENT_ID=
+SALESFORCE_CLIENT_SECRET=