feat!: remove version from decoder

[fryorcraken]

Problem / Description

version is used to store payload encryption information. It is actually useless:

• developer should attempt to decrypt messages based on usage of content topic
• failed decryption is cheap

And mixes up routing concern (Waku Message) with application concerns (payload encryption).

Solution

Stop reading version from messages in a phased removal.

Notes

• Resolves
• Related to

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Checklist

• Code changes are covered by unit tests.
• Code changes are covered by e2e tests, if applicable.
• Dogfooding has been performed, if feasible.
• A test version has been published, if required.
• All CI checks pass successfully.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku node	95.8 KB (-0.1% 🔽)	2 s (-0.1% 🔽)	1.5 s (+6.17% 🔺)	3.4 s
Waku Simple Light Node	147.22 KB (+0.02% 🔺)	3 s (+0.02% 🔺)	2.4 s (+40.21% 🔺)	5.3 s
ECIES encryption	22.47 KB (-0.22% 🔽)	450 ms (-0.22% 🔽)	615 ms (+4.46% 🔺)	1.1 s
Symmetric encryption	21.89 KB (-0.29% 🔽)	438 ms (-0.29% 🔽)	352 ms (-47.57% 🔽)	790 ms
DNS discovery	52.1 KB (-0.05% 🔽)	1.1 s (-0.05% 🔽)	795 ms (-31.72% 🔽)	1.9 s
Peer Exchange discovery	52.8 KB (-0.05% 🔽)	1.1 s (-0.05% 🔽)	1.4 s (+52.52% 🔺)	2.4 s
Peer Cache Discovery	46.62 KB (+0.11% 🔺)	933 ms (+0.11% 🔺)	1.1 s (+42.54% 🔺)	2 s
Privacy preserving protocols	77.04 KB (+0.03% 🔺)	1.6 s (+0.03% 🔺)	1.5 s (+18.74% 🔺)	3 s
Waku Filter	79.6 KB (-0.06% 🔽)	1.6 s (-0.06% 🔽)	1.7 s (+67.36% 🔺)	3.3 s
Waku LightPush	77.71 KB (-0.15% 🔽)	1.6 s (-0.15% 🔽)	1.2 s (+3.53% 🔺)	2.7 s
History retrieval protocols	83.48 KB (-0.12% 🔽)	1.7 s (-0.12% 🔽)	1.5 s (+53.22% 🔺)	3.2 s
Deterministic Message Hashing	28.84 KB (-0.14% 🔽)	577 ms (-0.14% 🔽)	644 ms (-24.41% 🔽)	1.3 s