Fix /health REST API panic

[chaitanyaprem]

Description

Noticed following panic when triggering health API without rln initialization.

2023/09/21 16:34:48 "GET http://127.0.0.1:8645/health HTTP/1.1" from 127.0.0.1:61835 - 000 0B in 56.458µs
2023/09/21 16:34:48 http: panic serving 127.0.0.1:61835: runtime error: invalid memory address or nil pointer dereference
goroutine 761 [running]:
net/http.(*conn).serve.func1()
	/usr/local/go/src/net/http/server.go:1854 +0xb0
panic({0x106fe0a60, 0x107c8cf30})
	/usr/local/go/src/runtime/panic.go:890 +0x258
github.com/waku-org/go-waku/cmd/waku/server/rest.(*HealthService).getHealth(0x14001289890?, {0x1300b05e0, 0x14001114cc0}, 0x7?)
	/Users/prem/Code/go-waku/cmd/waku/server/rest/health.go:33 +0x50
net/http.HandlerFunc.ServeHTTP(0x106fd1700?, {0x1300b05e0?, 0x14001114cc0?}, 0x1400165d33c?)
	/usr/local/go/src/net/http/server.go:2122 +0x38
github.com/go-chi/chi/v5.(*Mux).routeHTTP(0x1400055f8c0, {0x1300b05e0, 0x14001114cc0}, 0x140010e7600)
	/Users/prem/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.0/mux.go:436 +0x218
net/http.HandlerFunc.ServeHTTP(0x140004718c8?, {0x1300b05e0?, 0x14001114cc0?}, 0x7?)
	/usr/local/go/src/net/http/server.go:2122 +0x38
github.com/go-chi/chi/v5/middleware.NoCache.func1({0x1300b05e0, 0x14001114cc0}, 0x140010e7600)
	/Users/prem/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.0/middleware/nocache.go:54 +0x228
net/http.HandlerFunc.ServeHTTP(0x140010e7500?, {0x1300b05e0?, 0x14001114cc0?}, 0x10447cc18?)
	/usr/local/go/src/net/http/server.go:2122 +0x38
github.com/go-chi/chi/v5/middleware.RequestLogger.func1.1({0x10721a5a0, 0x14000a3e620}, 0x140010e7500)
	/Users/prem/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.0/middleware/logger.go:57 +0x120
net/http.HandlerFunc.ServeHTTP(0x10721be90?, {0x10721a5a0?, 0x14000a3e620?}, 0x107c8c440?)
	/usr/local/go/src/net/http/server.go:2122 +0x38
github.com/go-chi/chi/v5.(*Mux).ServeHTTP(0x1400055f8c0, {0x10721a5a0, 0x14000a3e620}, 0x140010e7400)
	/Users/prem/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.0/mux.go:87 +0x2e4
net/http.serverHandler.ServeHTTP({0x14000920090?}, {0x10721a5a0, 0x14000a3e620}, 0x140010e7400)
	/usr/local/go/src/net/http/server.go:2936 +0x2d8
net/http.(*conn).serve(0x14000984870, {0x10721bf38, 0x14000690150})
	/usr/local/go/src/net/http/server.go:1995 +0x560
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:3089 +0x520

Changes

• Fix panic in health REST API endpoint if rln is not initialized/compiled
• Update REST API yml files title. cc @NagyZoltanPeter , this has to be done across all files.

Tests

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	ae88615	#1	2023-09-21 11:35:01	~2 min	nix-flake	📄log
✔️	ae88615	#1	2023-09-21 11:35:26	~2 min	linux	📦deb
✔️	ae88615	#1	2023-09-21 11:35:51	~3 min	tests	📄log
✔️	ae88615	#1	2023-09-21 11:36:07	~3 min	tests	📄log
✔️	ae88615	#1	2023-09-21 11:36:57	~4 min	ios	📦tgz
✔️	ae88615	#1	2023-09-21 11:37:00	~4 min	android	📦tgz
✔️	b1bb5d4	#2	2023-09-21 11:36:42	~1 min	linux	📦deb
✔️	b1bb5d4	#2	2023-09-21 11:36:59	~1 min	nix-flake	📄log
✔️	b1bb5d4	#2	2023-09-21 11:37:11	~3 min	ios	📦tgz
✔️	b1bb5d4	#2	2023-09-21 11:37:29	~1 min	tests	📄log
✔️	b1bb5d4	#2	2023-09-21 11:38:18	~2 min	tests	📄log
✔️	b1bb5d4	#2	2023-09-21 11:40:44	~3 min	android	📦tgz