we can rather naively convert address strings to byte slices, and not
have to worry about bech32m encoding: the protos will accept the raw
byte slice as sufficient to reconstitute the address.

sprinkled around some debug logging to make sense of what's breaking.

pd was *silently failing* to process the weirdly constructed csv file.
the golang code was inserting liternal `\n`s rather than newlines.
pd should definitely error on this.

A previous debugging commit touched up the allocations indexing logic,
which wasn't necessary to fix the bug, but sure made things more
comprehensible. This commit restores the original allocations to the
pre-debugging values, aiui.

Updates the GetBalanceByAddress request to handle a gRPC streaming
request. Sadly the Penumbra docs aren't very clear that this method
returns a stream; we'll work on that! For now, the
for-loop-and-break-on-EOF seems a sufficiently idiomatic pattern for our
needs. Still to come is making the balance info intelligble.

… hi/lo amount bytes

…igint and rpc changes