feat(discovery): add spanKind metadata to discovery platform spans

Attach spanKind on discovery.list, mesh, publish, and join spans so
dev-log filters and diagnostics align with contacts/DM span conventions.
discovery.join now records activeChannelId when a channel is selected.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -7897,6 +7897,7 @@ class PearcordPlatform extends EventEmitter {
     if (!this.discovery) throw new Error('discovery unavailable')
     const beforeListed = this.discovery.isGuildPublicListing(guildId)
     const span = this.log.time('discovery.publish', {
+      spanKind: 'discovery.publish',
       guildId,
       listed: !!listed,
       beforeListed
@@ -7917,6 +7918,7 @@ class PearcordPlatform extends EventEmitter {
       }
       this.emit('discovery')
       span.end({
+        spanKind: 'discovery.publish',
         guildId,
         listed: !!listed,
         hasInvite: !!inviteCode,
@@ -7937,11 +7939,17 @@ class PearcordPlatform extends EventEmitter {
   async joinPublicDiscovery (inviteCode) {
     if (!inviteCode) throw new Error('invite code required')
     const span = this.log.time('discovery.join', {
+      spanKind: 'discovery.join',
       inviteLen: String(inviteCode).length
     })
     try {
       const guild = await this.joinInvite(inviteCode)
-      span.end({ guildId: guild?.id || null, joined: !!guild })
+      span.end({
+        spanKind: 'discovery.join',
+        guildId: guild?.id || null,
+        joined: !!guild,
+        activeChannelId: this.activeChannelId || null
+      })
       return guild
     } catch (err) {
       this.log.error('discovery.join error', {
@@ -12804,8 +12812,9 @@ class PearcordPlatform extends EventEmitter {
           const filteredCount = this.discovery
             ? this.discovery.filterPublicListings(publicListings, filter).length
             : publicListings.length
-          const listSpan = this.log.time('discovery.list', {})
+          const listSpan = this.log.time('discovery.list', { spanKind: 'discovery.list' })
           listSpan.end({
+            spanKind: 'discovery.list',
             count: publicListings.length,
             filterTag: filter?.tag || null,
             meshLive: (this.discovery?.peers?.size || 0) > 0,
@@ -12819,13 +12828,14 @@ class PearcordPlatform extends EventEmitter {
       } else {
         try {
           if (!light) {
-            const listSpan = this.log.time('discovery.list', {})
+            const listSpan = this.log.time('discovery.list', { spanKind: 'discovery.list' })
             publicListings = await this.discovery.listPublicListings()
             const filter = this._discoveryFilter
             const filteredCount = this.discovery
               ? this.discovery.filterPublicListings(publicListings, filter).length
               : publicListings.length
             listSpan.end({
+              spanKind: 'discovery.list',
               count: publicListings.length,
               filterTag: filter?.tag || null,
               meshLive: (this.discovery?.peers?.size || 0) > 0,
@@ -12871,10 +12881,11 @@ class PearcordPlatform extends EventEmitter {
         this._cachedDiscoveryStats = discoveryStats
         this._cachedDiscoveryStatsAt = now
       } else {
-        const meshSpan = this.log.time('discovery.mesh', {})
+        const meshSpan = this.log.time('discovery.mesh', { spanKind: 'discovery.mesh' })
         const hadCachedStats = !!this._cachedDiscoveryStats
         discoveryStats = await this.discovery.refreshStats()
         meshSpan.end({
+          spanKind: 'discovery.mesh',
           peers: discoveryStats?.peers ?? 0,
           listings: discoveryStats?.listings ?? publicListings.length,
           meshLive: !!discoveryStats?.meshLive,