Fix add/publish so we wait for the state to be loaded

[arj03]

This fixed the problem found in ssbc/ssb-friends#49. Namely that we don't wait for the state to be loaded, so we end up with the wrong validate. Only publish and add really need this anyway which is why they are the only ones with this check.

[arj03]

Must have been the random failure we have seen one time before. Works locally.

[github-actions]

Benchmark results

Part	Duration
Migration (using ssb-db)	8218ms
Migration (alone)	3483ms
Memory usage without indexes	509.31 MB = 22.41 MB + etc
Initial indexing	2332ms
Initial indexing compat	767ms
Two indexes updating concurrently	975ms
key one initial	599ms
key two	3ms
key one again	4ms
latest root posts	311ms
latest posts	4ms
votes one initial	476ms
votes again	0ms
hasRoot	318ms
hasRoot again	0ms
author one posts	323ms
author two posts	81ms
dedicated author one posts	322ms
dedicated author one posts again	0ms
Maximum memory usage	608.51 MB = 59.43 MB + etc

[staltz]

Nice find!

[github-actions]

Benchmark results

Part	Duration
Migration (using ssb-db)	10726ms
Migration (alone)	4659ms
Memory usage without indexes	507.79 MB = 25.95 MB + etc
Initial indexing	3570ms
Initial indexing compat	1065ms
Two indexes updating concurrently	1236ms
key one initial	752ms
key two	2ms
key one again	0ms
latest root posts	470ms
latest posts	11ms
votes one initial	658ms
votes again	0ms
hasRoot	447ms
hasRoot again	0ms
author one posts	450ms
author two posts	105ms
dedicated author one posts	465ms
dedicated author one posts again	0ms
Maximum memory usage	598.48 MB = 49.65 MB + etc