[Custom Processors] rust token_v2_processor missing most NFT burn events

[alex4506]

Description

If the NFT mint & burn acttions are not too close in time, the burn event will be missing

Repro

1. Run the token_v2_processor
2. Mint a NFT and wait for more than 1000 transaction versions
3. Burn the NFT
4. No burn event in token_activities_v2 table for this NFT

Analysis

The possible reason is the hashmap token_v2_metadata_helper is constructed by write resource, but the burn event like this has no such write resource, which breaks the process progress

[bowenyang007]

Good catch. Thanks for flagging! Looks like we need to reuse the same logic as token v2 ownership. https://github.com/aptos-labs/aptos-indexer-processors/blob/main/rust/processor/src/models/token_v2_models/v2_token_ownerships.rs#L222-L357. We'll need to fix this and backfill.