Szerencsejatek Telegram Bot

1. User registers lines via Telegram commands (see FR-2 / docs/requirements.md §3 table).
2. Draw pipeline (CloudEvents, see docs/architecture.md §2.1): draw.update.requested → fetch → draw.result.persist → DB insert if new → draw.result.stored → for each subscriber user.notification.requested → OutboundNotifier (Telegram or future adapters).
3. Matching per line: hit count (see format_otoslotto_user_message); prize tiers later.

Technical expectations

• End of iteration: Review the code before closing the task — run deno task check, scan the diff for scope creep and regressions, align with docs/ (see AGENTS.md § After each iteration).
• Comments: Do not add trivial or redundant comments; prefer explicit names and small functions. Comment only for non-obvious rationale, invariants, or compliance (see AGENTS.md).
• Observability: OpenTelemetry metrics/traces when OTEL_EXPORTER_OTLP_ENDPOINT is set — see ADR 0007 and src/observability/.
• Stack: TypeScript, Deno. Persist draws and lines with Drizzle + libSQL (SQLite file) as in docs/architecture.md and ADR 0002. HTTP entry: src/server.ts (CloudEvents); telegram_bot.ts for long polling. Helm default: both in one Pod + hourly CronJob (deploy/helm/...). Keep docs/ and docs/adr/ aligned after substantive edits (ADR 0004). For architecture ADRs: ask the user to approve ADR text before filling Approved by and Approved at (UTC ISO timestamp) in the Review section.
• New dependencies: When you add npm: or jsr: imports (import map or pinned in src/), record it in the same PR in the appropriate ADR Dependencies section (or a new ADR) and dependency inventory—same rule as ADR 0004 §6.
• Matching: Implement pure functions: (drawResult, userLine) => MatchResult. Unit test edge cases (duplicate numbers, order independence).
• Results source: Follow the chosen strategy in requirements (official API, RSS, manual admin, etc.). Do not add scraping without updating docs/requirements.md and user approval.

Copy and locale

• NFR-4: All user-visible strings through src/i18n/ (t(), locales/hu.ts). Hungarian v1.
• Telegram HTML for notifications and replies: <code> for numbers, not for slash-commands (see FR-5 in docs/requirements.md). Keep messages concise: game name, draw id, winning numbers, per-line hits.

Files to update together

• Changing game rules: src/domain/*, tests, docs/requirements.md (and architecture if needed).
• Changing notification or command behaviour: docs/requirements.md §3/§9/§10, i18n keys, tests.