feat(events): Phase 4 — provider adapters for Eventbrite + Meetup

- Add EventProvider interface (base.ts) with fetchEvents(url, name, ctx, config)
- Refactor iCal parser and website extractor as provider adapters
- Add Eventbrite provider: API v3 search by location, category mapping,
  price info extraction. Requires EVENTBRITE_API_KEY env var.
- Add Meetup provider: GraphQL API search by location, topic→category
  mapping, HTML stripping. Requires MEETUP_API_KEY env var.
- Provider registry (getProvider, PROVIDER_TYPES) replaces hardcoded
  switch in crawl-scheduler
- Crawl scheduler now joins sources with regions for ProviderContext
  (lat/lon/radius/label) — platform providers need this for geo-search
- Source creation accepts 'eventbrite' and 'meetup' types (url optional)
- Both providers gracefully return empty when API keys unconfigured

116 tests (all passing), no regressions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/mana/apps/web/src/lib/modules/events/discovery/api.ts

@@ -95,8 +95,8 @@ export async function getSources(): Promise<DiscoverySource[]> {
 }
 
 export async function createSource(input: {
-	type: 'ical' | 'website';
-	url: string;
+	type: 'ical' | 'website' | 'eventbrite' | 'meetup';
+	url?: string;
 	name: string;
 	regionId: string;
 	crawlIntervalHours?: number;

apps/mana/apps/web/src/lib/modules/events/discovery/types.ts

@@ -20,9 +20,11 @@ export interface DiscoveryInterest {
 	createdAt: string;
 }
 
+export type SourceType = 'ical' | 'website' | 'eventbrite' | 'meetup';
+
 export interface DiscoverySource {
 	id: string;
-	type: 'ical' | 'website';
+	type: SourceType;
 	url: string | null;
 	name: string;
 	regionId: string | null;