Fix missing DAO Contract Address Issue

[0xjame5]

Problem:
given an indexer handle matches a contract type, but the underlying logic used to parse the contract fail we fail close.

Solution:
Instead fail open on missing a DAO Contract address. This means that given a pluggable indexer's handle run fails then we fail open.

[0xjame5]

indexer_1         | thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: no dao_address', /app/src/historical_parser.rs:85:69
indexer_1         | stack backtrace:
indexer_1         |    0:     0x560c95bf92ad - std::backtrace_rs::backtrace::libunwind::trace::hee598835bc88d35b
indexer_1         |                                at /r

[gavindoughtie]

I might have fixed this with my latest commit; want to try?

[0xjame5]

Yep this is closed