Scheduled migrations

[batconjurer]

Allow nodes to schedule a migrations json to be read and run to facilitate hard-forking. This is done by taking a migrations json and passing the path, a hash of the contents, and a block height to the node when starting the ledger.

Describe your changes

Indicate on which release or other PRs this topic is based on

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[codecov]

Codecov Report

Attention: Patch coverage is 34.15842% with 133 lines in your changes are missing coverage. Please review.

Project coverage is 53.87%. Comparing base (6dc1612) to head (649bc55).
Report is 2 commits behind head on main.

Files	Patch %	Lines
crates/apps_lib/src/cli.rs	0.00%	40 Missing ⚠️
crates/sdk/src/migrations.rs	64.77%	31 Missing ⚠️
crates/node/src/lib.rs	0.00%	19 Missing ⚠️
crates/node/src/storage/rocksdb.rs	0.00%	19 Missing ⚠️
crates/node/src/shell/mod.rs	60.00%	8 Missing ⚠️
crates/node/src/shell/testing/node.rs	0.00%	8 Missing ⚠️
crates/storage/src/db.rs	0.00%	5 Missing ⚠️
crates/node/src/shims/abcipp_shim.rs	0.00%	2 Missing ⚠️
crates/node/src/bench_utils.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3310      +/-   ##
==========================================
- Coverage   53.89%   53.87%   -0.02%     
==========================================
  Files         314      314              
  Lines      105704   105884     +180     
==========================================
+ Hits        56968    57049      +81     
- Misses      48736    48835      +99     

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