Add forex plugin, stability fixes, and async HTTP dispatch

- Add forex plugin (Frankfurter v2 API) with rate lookups, analysis,
  DM-based alerts, and daily cron poll. Backfills 1 year of history
  on startup for moving averages and buy signal scoring.

- Fix bot hang caused by SQLite lock contention in reminder polling:
  rows cursor was held open while writing to the same DB. Collect
  results first, close cursor, then process. Same fix in milkcarton.

- Add sync retry loop so the bot reconnects after network drops
  instead of silently exiting. StopSync() for clean Ctrl+C shutdown.

- Add panic recovery to all dispatch, syncer, and cron paths.

- Make all HTTP-calling plugin commands async (goroutines) so a slow
  or dead external API cannot block the message dispatch pipeline.
  Affects: lookup, stocks, forex, anime, movies, concerts, gaming,
  retro, wotd, urls, howami.

- Extract DisplayName to Base, add db.Exec helper, convert silent
  error discards across the codebase.

- Fix UNO mercy-kill bug (eliminated bot continues playing), adventure
  DM nag spam, stats column mismatch, per-call regex/replacer allocs.

- Update README: forex commands, Finance section, 47 plugins.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/plugin/wordle_render.go

@@ -72,15 +72,20 @@ func renderKeyboard(states map[rune]LetterResult) string {
 }
 
 // renderWordleStartAnnouncement renders the puzzle start message.
-func renderWordleStartAnnouncement(puzzleNumber, wordLength int) string {
-	return fmt.Sprintf(
-		"🟩 **Daily Wordle #%d**\nA new %d-letter puzzle is ready! Work together — 6 guesses shared.\n\nGuess with: `!wordle <word>`",
+func renderWordleStartAnnouncement(puzzleNumber, wordLength int, hint string) string {
+	base := fmt.Sprintf(
+		"🟩 **Daily Wordle #%d**\nA new %d-letter puzzle is ready! Work together — 6 guesses shared.",
 		puzzleNumber, wordLength,
 	)
+	if hint != "" {
+		base += fmt.Sprintf("\n🎮 **Hint:** %s", hint)
+	}
+	base += "\n\nGuess with: `!wordle <word>`"
+	return base
 }
 
 // renderSolvedAnnouncement renders the solved puzzle message.
-func renderSolvedAnnouncement(puzzle *WordlePuzzle, definition string) string {
+func renderSolvedAnnouncement(puzzle *WordlePuzzle, definition string, payouts []WordlePayout) string {
 	var sb strings.Builder
 
 	// Find the solver.
@@ -107,18 +112,29 @@ func renderSolvedAnnouncement(puzzle *WordlePuzzle, definition string) string {
 		sb.WriteString("\n")
 	}
 
-	// Contributors.
-	sb.WriteString("\n🏆 Today's contributors:\n")
-	contributors := wordleContributors(puzzle)
-	for _, c := range contributors {
-		line := fmt.Sprintf("  %s — %d guess", c.name, c.guesses)
-		if c.guesses != 1 {
-			line += "es"
+	// Contributors with payouts.
+	if len(payouts) > 0 {
+		sb.WriteString("\n💰 **Payouts:**\n")
+		for _, pay := range payouts {
+			bonus := ""
+			if pay.Solver {
+				bonus = " 🏆 (solver bonus!)"
+			}
+			sb.WriteString(fmt.Sprintf("  **%s**: +€%d%s\n", pay.Name, pay.Amount, bonus))
 		}
-		if c.solved {
-			line += " 🏆"
+	} else {
+		sb.WriteString("\n🏆 Today's contributors:\n")
+		contributors := wordleContributors(puzzle)
+		for _, c := range contributors {
+			line := fmt.Sprintf("  %s — %d guess", c.name, c.guesses)
+			if c.guesses != 1 {
+				line += "es"
+			}
+			if c.solved {
+				line += " 🏆"
+			}
+			sb.WriteString(line + "\n")
 		}
-		sb.WriteString(line + "\n")
 	}
 
 	return sb.String()