fix: include backfill_operations in deleteaccount existence check and deletion

- Add hasUserBackfillOperations() and hasUserActiveBackfill() to BackfillManager
- Refuse /deleteaccount while an in_progress backfill exists for the user
- Delete backfill_operations rows as part of account deletion flow
- Update confirmation and success embeds to list backfill history
- Update api-reference.md and full-documentation.md to document the deletion

Signed-off-by: Michael Cramer <michael@bigmichi1.de>

Author: BigMichi1

docs/api-reference.md

@@ -720,21 +720,24 @@ Permanently delete all data the bot holds about the invoking user.
 **Parameters**: None
 
 **Flow**:
-1. Bot checks whether credentials exist for the user. If none are found, responds with a warning and exits.
-2. Bot sends an ephemeral embed with Yes / Cancel buttons (30-second timeout).
-3. If the user clicks **Yes, delete everything**: credentials, all redeemed code records, and audit log entries are permanently removed. A summary is shown.
-4. If the user clicks **Cancel** or the timeout elapses: no data is changed.
+1. Bot checks whether credentials or backfill history exist for the user. If none are found, responds with a warning and exits.
+2. Bot checks whether a backfill the user initiated is currently in progress; if so, refuses deletion until it completes.
+3. Bot sends an ephemeral embed with Yes / Cancel buttons (30-second timeout).
+4. If the user clicks **Yes, delete everything**: credentials, all redeemed code records, audit log entries, and backfill operation history are permanently removed. A summary is shown.
+5. If the user clicks **Cancel** or the timeout elapses: no data is changed.
 
 **Data removed on confirmation**:
 - `users` row (credentials, server, autoredeem preference)
 - All `redeemed_codes` rows for the user
 - All `audit_log` rows for the user
+- All `backfill_operations` rows for the user
 
 **Error Codes**:
 
 | Code | Meaning | Resolution |
 |------|---------|------------|
-| `NO_ACCOUNT` | No credentials stored for this user | Nothing to delete |
+| `NO_ACCOUNT` | No credentials or backfill history stored for this user | Nothing to delete |
+| `BACKFILL_IN_PROGRESS` | A backfill the user initiated is still running | Wait for the backfill to complete, then retry |
 
 **Example**:
 ```

docs/full-documentation.md

@@ -215,6 +215,7 @@ Permanently and irreversibly delete all data the bot holds about you. Requires a
   - Your Idle Champions credentials (user ID + hash)
   - Your full code redemption history
   - Your audit log entries
+  - Your backfill operation history
 - **Confirmation:** A Yes / Cancel button prompt appears with a 30-second timeout — no action is taken unless you click **Yes, delete everything**
 - **After deletion:** You will need to run `/setup` again to use the bot
 - **Example:** `/deleteaccount`

src/bot/commands/deleteaccount.ts

@@ -109,6 +109,24 @@ export async function execute(interaction: ChatInputCommandInteraction) {
       return;
     }
 
+    // Refuse deletion if the user has an active backfill — completing it would
+    // try to write to rows that no longer exist after account deletion.
+    if (await backfillManager.hasUserActiveBackfill(interaction.user.id)) {
+      await interaction.editReply({
+        embeds: [
+          new EmbedBuilder()
+            .setColor(0xffaa00)
+            .setTitle('⚠️ Backfill In Progress')
+            .setDescription(
+              'A backfill operation you initiated is currently running. ' +
+                'Please wait for it to complete before deleting your account.'
+            ),
+        ],
+        components: [],
+      });
+      return;
+    }
+
     // Perform deletion — order matters for FK constraints:
     // pending_codes.discord_id → users.discord_id (no cascade), so clear it first
     await codeManager.clearPendingCodes(interaction.user.id);

src/bot/database/backfillManager.ts

@@ -109,6 +109,21 @@ class BackfillManager {
     return row !== undefined;
   }
 
+  async hasUserActiveBackfill(discordId: string): Promise<boolean> {
+    const row = db
+      .select({ id: backfillOperations.id })
+      .from(backfillOperations)
+      .where(
+        and(
+          eq(backfillOperations.initiatedBy, discordId),
+          eq(backfillOperations.status, 'in_progress')
+        )
+      )
+      .limit(1)
+      .get();
+    return row !== undefined;
+  }
+
   async deleteUserBackfillOperations(discordId: string): Promise<number> {
     const rows = db
       .select({ id: backfillOperations.id })