fix: always apply database schema on startup

Previously, the application only applied the schema if auth.users table
didn't exist. This caused issues when upgrading - new schema elements
(like storage.trash_items view) weren't created on existing databases.

Now the schema is applied on every startup. Since schema.sql uses
'IF NOT EXISTS' and 'CREATE OR REPLACE', it's safe to run repeatedly.

src/infrastructure/db.rs

@@ -1,6 +1,6 @@
 use crate::common::config::AppConfig;
 use anyhow::Result;
-use sqlx::{PgPool, Row, postgres::PgPoolOptions};
+use sqlx::{PgPool, postgres::PgPoolOptions};
 use std::time::Duration;
 
 pub async fn create_database_pool(config: &AppConfig) -> Result<PgPool> {
@@ -37,8 +37,8 @@ pub async fn create_database_pool(config: &AppConfig) -> Result<PgPool> {
                     Ok(_) => {
                         tracing::info!("PostgreSQL connection established successfully");
 
-                        if !tables_exist(&pool).await {
+                        // Always apply schema - it's idempotent (uses IF NOT EXISTS and CREATE OR REPLACE)
-                            tracing::warn!("Database tables do not exist. Auto-applying schema...");
+                        tracing::info!("Applying database schema...");
                         if let Err(e) = apply_schema(&pool).await {
                             return Err(anyhow::anyhow!(
                                 "Database schema could not be applied: {}. \
@@ -46,16 +46,7 @@ pub async fn create_database_pool(config: &AppConfig) -> Result<PgPool> {
                                 e
                             ));
                         }
-
+                        tracing::info!("Database schema applied successfully");
-                            // Verify tables were actually created
-                            if !tables_exist(&pool).await {
-                                return Err(anyhow::anyhow!(
-                                    "Database schema was applied but tables still missing. \
-                                         Check db/schema.sql for errors."
-                                ));
-                            }
-                            tracing::info!("Database schema applied and verified successfully");
-                        }
 
                         return Ok(pool);
                     }
@@ -91,17 +82,6 @@ pub async fn create_database_pool(config: &AppConfig) -> Result<PgPool> {
     ))
 }
 
-/// Check whether the core auth tables exist in the database.
-async fn tables_exist(pool: &PgPool) -> bool {
-    sqlx::query(
-        "SELECT EXISTS (SELECT 1 FROM pg_tables WHERE schemaname = 'auth' AND tablename = 'users')",
-    )
-    .fetch_one(pool)
-    .await
-    .map(|row| row.get::<bool, _>(0))
-    .unwrap_or(false)
-}
-
 /// Apply the embedded schema.sql to the database.
 /// First tries `raw_sql` (simple query protocol). If that fails, falls back
 /// to splitting the SQL into individual statements and executing them one by one.