feat(15-02): wire Trello, Notion, Confluence, GoogleDocs into RegisterAll

- RegisterAll extended to 56 sources (52 Phase 10-14 + 4 Phase 15 collab)
- All four sources credentialless, no new SourcesConfig fields needed

pkg/recon/sources/register.go

@@ -60,8 +60,8 @@ type SourcesConfig struct {
 
 // RegisterAll registers every Phase 10 code-hosting, Phase 11 search engine /
 // paste site, Phase 12 IoT scanner / cloud storage, Phase 13 package
-// registry / container / IaC, and Phase 14 CI/CD log / web archive /
-// frontend leak source on engine (52 sources total).
+// registry / container / IaC, Phase 14 CI/CD log / web archive / frontend
+// leak, and Phase 15 collaboration tool source on engine (56 sources total).
 //
 // All sources are registered unconditionally so that cmd/recon.go can surface
 // the full catalog via `keyhunter recon list` regardless of which credentials
@@ -260,4 +260,10 @@ func RegisterAll(engine *recon.Engine, cfg SourcesConfig) {
 
 	// Phase 14: JS bundle analysis (credentialless).
 	engine.Register(&JSBundleSource{Registry: reg, Limiters: lim})
+
+	// Phase 15: Collaboration tool sources (credentialless).
+	engine.Register(&TrelloSource{Registry: reg, Limiters: lim})
+	engine.Register(&NotionSource{Registry: reg, Limiters: lim})
+	engine.Register(&ConfluenceSource{Registry: reg, Limiters: lim})
+	engine.Register(&GoogleDocsSource{Registry: reg, Limiters: lim})
 }