Mass-mark deprecated APIs with [Obsolete]

[Arlodotexe]

The problem

Since this project was last maintained, several APIs in Kubo have been marked deprecated, but were not marked [Obsolete] in our API.

The solution

Go through all deprecated rpc commands and mark the corresponding methods / classes as [Obsolete] in our codebase.

[Arlodotexe]

Some progress was made towards this in #29

[Arlodotexe]

More progress made towards this in #41.

Shipyard team has confirmed they plan to de-deprecate the pubsub commands, which only leaves the Dht commands to replace. These have since been replaced with the routing commands, which aren't available in our API yet.

[Arlodotexe]

Summary

Audited Kubo deprecated RPC endpoints and cross‑referenced this codebase (and http-client) to identify any symbols to mark [Obsolete].

Shortlist (PubSub excluded due to upstream reversal)

• /api/v0/bitswap/reprovide
• /api/v0/dht/query
• /api/v0/object/diff
• /api/v0/object/patch/add-link
• /api/v0/object/patch/rm-link
• /api/v0/stats/provide

Cross‑reference results

• Object API: already removed from this repo (and from http-client). No IObjectApi or object/* methods present.
• Bitswap reprovide: no corresponding method in IBitswapApi.
• DHT query: IDhtApi exposes routing/value store abstractions only; no Query method surface exists.
• Stats provide: no corresponding method in IStatsApi.
• PubSub: kept as supported (deprecation reversed upstream); do not mark obsolete.

Conclusion

No public APIs in this codebase map to Kubo’s deprecated endpoints. Nothing to mark [Obsolete]. Closing as complete.

Refs:

• Deprecated RPC list: https://docs.ipfs.tech/reference/kubo/rpc/#deprecated-rpc-commands