[1.1.0] Do not allow replay-blockchain without snapshot

[heifner]

Do not allow --replay-blockchain option without --snapshot option unless a full block log is available as it will fail and leave the blockchain in a non-recoverable state.

While attempting to reproduce #1152, I kicked off a --replay-blockchain but forgot to add the --snapshot option. I didn't have a full block log. This resulted in the following:

info  2025-02-08T13:32:56.675 nodeos    chain_plugin.cpp:778          plugin_initialize    ] Replay requested: deleting state database
info  2025-02-08T13:32:57.062 nodeos    chain_plugin.cpp:933          plugin_initialize    ] Starting fresh blockchain state using default genesis state.
...
info  2025-02-08T13:32:57.915 nodeos    listener.hpp:150              log_listening        ] start listening on 127.0.0.1:7777 resolved from 127.0.0.1:7777 for API categories: all
warn  2025-02-08T13:32:57.916 nodeos    controller.cpp:4379           apply_blocks         ] 3020001 fork_db_block_not_found: Block can not be found
block 000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a does not exist
    {"id":"000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a"}
    nodeos  fork_database.cpp:509 fetch_branch_from_impl

warn  2025-02-08T13:32:57.916 nodeos    controller.cpp:4379           apply_blocks         ] 3020001 fork_db_block_not_found: Block can not be found
block 000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a does not exist
    {"id":"000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a"}
    nodeos  fork_database.cpp:509 fetch_branch_from_impl

error 2025-02-08T13:32:57.916 nodeos    producer_plugin.cpp:949       on_incoming_block    ] Cannot recover from 3020001 fork_db_block_not_found: Block can not be found
block 000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a does not exist
    {"id":"000000017c8ae6fcc236a1254b032f9b375971d88025e717fcba43aeee9aa41a"}
    nodeos  fork_database.cpp:509 fetch_branch_from_impl
rethrow
    {}
    nodeos  controller.cpp:4380 apply_blocks
. Shutting down.

At this point the the state directory has to be removed and restart is required from the snapshot.

[linh2931]

You can add a comment saying returning 0 if block logs do not exist. This comment is optional.

[heifner]

Since there are no comments on any of the methods, including first_block_num(). I think I'll leave it as is to avoid having to wait on another ci/cd run.

[linh2931]

Just leave as is.