Create company endpoints

backend/.sqlc/queries/companies.sql

@@ -0,0 +1,41 @@
+-- name: CreateCompany :one
+INSERT INTO companies (
+  owner_id,
+  name,
+  wallet_address,
+  linkedin_url
+) VALUES (
+  $1, $2, $3, $4
+)
+RETURNING *;
+
+-- name: GetCompanyByID :one
+SELECT * FROM companies
+WHERE id = $1;
+
+-- name: GetCompanyByOwnerID :one
+SELECT * FROM companies
+WHERE owner_id = $1;
+
+-- name: UpdateCompany :one
+UPDATE companies
+SET 
+  name = COALESCE($2, name),
+  wallet_address = COALESCE($3, wallet_address),
+  linkedin_url = COALESCE($4, linkedin_url),
+  updated_at = extract(epoch from now())
+WHERE id = $1
+RETURNING *;
+
+-- name: DeleteCompany :exec
+DELETE FROM companies
+WHERE id = $1;
+
+-- name: ListCompanies :many
+SELECT * FROM companies
+WHERE owner_id = $1
+ORDER BY created_at DESC;
+
+-- name: GetCompanyWithAuth :one
+SELECT * FROM companies 
+WHERE (owner_id = $1 OR $2 = 'admin') AND id = $3;