feat: add DM notification preferences and code detection alerts

[BigMichi1]

• Add dmOnCode, dmOnSuccess, dmOnFailure columns to users table
• Generate migration 0005_grey_saracen for new columns
• Add getDiscordIdsWithDmOnCode() and setNotificationPreferences() to userManager
• DM code-detected users in bot.ts MessageCreate handler
• Gate auto-redeem success DM on dmOnSuccess preference
• Send failure DM when dmOnFailure preference is enabled
• Add /notifications command to view and update preferences
• Register /notifications in bot.ts command list
• Add /notifications entry to /help command

[github-actions]

✅ Coverage Report

Metric	Value
Current coverage	54.17% (928/1713)
Baseline coverage	48.45% (737/1521)
Result	PASS

New Files

File	Coverage	Lines	Status
src/bot/commands/notifications.test.ts	—	—	SKIP (ignored)
src/bot/commands/notifications.ts	97.39%	112/115	PASS

Changed Files

File	Baseline	Current	Status
src/bot/bot.ts	N/A	N/A	SKIP (new to coverage)
src/bot/commands/help.ts	N/A	N/A	SKIP (new to coverage)
src/bot/database/codeManager.test.ts	—	—	SKIP (ignored)
src/bot/database/codeManager.ts	73.71%	77.18%	PASS
src/bot/database/schema/users.ts	100.00%	100.00%	PASS
src/bot/database/userManager.test.ts	—	—	SKIP (ignored)
src/bot/database/userManager.ts	91.75%	93.04%	PASS
src/bot/handlers/autoRedeemer.test.ts	—	—	SKIP (ignored)
src/bot/handlers/autoRedeemer.ts	88.73%	92.02%	PASS

[Copilot]

Pull request overview

Adds per-user DM notification preferences (code detected, redeem success, redeem failure) backed by three new boolean columns on users, a new /notifications slash command to view/update them, and DM fan-outs in the MessageCreate handler and auto-redeemer that respect the new flags.

Changes:

• Schema + migration 0005_grey_saracen adding dm_on_code, dm_on_success, dm_on_failure and matching UserCredentials fields / getAllUsersWithDmOnCode + setNotificationPreferences helpers.
• New /notifications command (with /help entry and registration in bot.ts).
• DM fan-out on code detection in MessageCreate, and gating of success/failure DMs in autoRedeemer.ts on the new preferences.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/bot/database/schema/users.ts	Adds three boolean preference columns.
src/bot/database/migrations/0005_grey_saracen.sql	SQLite migration for the new columns.
src/bot/database/migrations/meta/0005_snapshot.json	Drizzle snapshot for migration 0005.
src/bot/database/migrations/meta/_journal.json	Registers the new migration entry.
src/bot/database/userManager.ts	Adds NotificationPreferences, defaults in row mapper, getAllUsersWithDmOnCode, and setNotificationPreferences.
src/bot/handlers/autoRedeemer.ts	Gates success DM on dmOnSuccess; sends failure DM when dmOnFailure is enabled.
src/bot/bot.ts	Registers /notifications and DMs opted-in users when codes are detected.
src/bot/commands/notifications.ts	New slash command to view/update preferences.
src/bot/commands/help.ts	Adds /notifications to the help embed.
IDEAS/TODO.md	Marks the DM/notification ideas as implemented.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 7 comments.

[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 8 comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.