Remove legacy V1 code and clean up unused remnants

- Delete unused bloom.ts module (leftover from topic-based discovery)
- Remove maxTopicsPerOffer configuration (no longer used)
- Remove unused info field from Offer types
- Simplify generateOfferHash() to only hash SDP (remove topics param)
- Update outdated comments referencing deprecated features
- Remove backward compatibility topics field from answer responses

This completes the migration to V2 service-based architecture by
removing all remnants of the V1 topic-based system.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/config.ts

@@ -16,7 +16,6 @@ export interface Config {
   offerMinTtl: number;
   cleanupInterval: number;
   maxOffersPerRequest: number;
-  maxTopicsPerOffer: number;
 }
 
 /**
@@ -45,7 +44,6 @@ export function loadConfig(): Config {
     offerMaxTtl: parseInt(process.env.OFFER_MAX_TTL || '86400000', 10),
     offerMinTtl: parseInt(process.env.OFFER_MIN_TTL || '60000', 10),
     cleanupInterval: parseInt(process.env.CLEANUP_INTERVAL || '60000', 10),
-    maxOffersPerRequest: parseInt(process.env.MAX_OFFERS_PER_REQUEST || '100', 10),
-    maxTopicsPerOffer: parseInt(process.env.MAX_TOPICS_PER_OFFER || '50', 10),
+    maxOffersPerRequest: parseInt(process.env.MAX_OFFERS_PER_REQUEST || '100', 10)
   };
 }