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- Update outdated comments referencing deprecated features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/storage/d1.ts

@@ -34,7 +34,7 @@ export class D1Storage implements Storage {
    */
   async initializeDatabase(): Promise<void> {
     await this.db.exec(`
-      -- Offers table (no topics)
+      -- WebRTC signaling offers
       CREATE TABLE IF NOT EXISTS offers (
         id TEXT PRIMARY KEY,
         peer_id TEXT NOT NULL,
@@ -125,7 +125,7 @@ export class D1Storage implements Storage {
 
     // D1 doesn't support true transactions yet, so we do this sequentially
     for (const offer of offers) {
-      const id = offer.id || await generateOfferHash(offer.sdp, []);
+      const id = offer.id || await generateOfferHash(offer.sdp);
       const now = Date.now();
 
       await this.db.prepare(`

src/storage/hash-id.ts

@@ -1,22 +1,17 @@
 /**
  * Generates a content-based offer ID using SHA-256 hash
- * Creates deterministic IDs based on offer content (sdp, topics)
+ * Creates deterministic IDs based on offer SDP content
  * PeerID is not included as it's inferred from authentication
  * Uses Web Crypto API for compatibility with both Node.js and Cloudflare Workers
  *
  * @param sdp - The WebRTC SDP offer
- * @param topics - Array of topic strings
- * @returns SHA-256 hash of the sanitized offer content
+ * @returns SHA-256 hash of the SDP content
  */
-export async function generateOfferHash(
-  sdp: string,
-  topics: string[]
-): Promise<string> {
+export async function generateOfferHash(sdp: string): Promise<string> {
   // Sanitize and normalize the offer content
   // Only include core offer content (not peerId - that's inferred from auth)
   const sanitizedOffer = {
-    sdp,
-    topics: [...topics].sort(), // Sort topics for consistency
+    sdp
   };
 
   // Create non-prettified JSON string

src/storage/sqlite.ts

@@ -36,7 +36,7 @@ export class SQLiteStorage implements Storage {
    */
   private initializeDatabase(): void {
     this.db.exec(`
-      -- Offers table (no topics)
+      -- WebRTC signaling offers
       CREATE TABLE IF NOT EXISTS offers (
         id TEXT PRIMARY KEY,
         peer_id TEXT NOT NULL,
@@ -132,7 +132,7 @@ export class SQLiteStorage implements Storage {
     const offersWithIds = await Promise.all(
       offers.map(async (offer) => ({
         ...offer,
-        id: offer.id || await generateOfferHash(offer.sdp, []),
+        id: offer.id || await generateOfferHash(offer.sdp),
       }))
     );
 

src/storage/types.ts

@@ -1,5 +1,5 @@
 /**
- * Represents a WebRTC signaling offer (no topics)
+ * Represents a WebRTC signaling offer
  */
 export interface Offer {
   id: string;
@@ -9,7 +9,6 @@ export interface Offer {
   expiresAt: number;
   lastSeen: number;
   secret?: string;
-  info?: string;
   answererPeerId?: string;
   answerSdp?: string;
   answeredAt?: number;
@@ -37,7 +36,6 @@ export interface CreateOfferRequest {
   sdp: string;
   expiresAt: number;
   secret?: string;
-  info?: string;
 }
 
 /**