safrole traces: RAW kv state + bootstrap service implementation

[sourabhniyogi]

safrole - traces: RAW kv state + state_snapshots: dev-friendly C1-C15 state

To support JAM implementers to derive each others state roots, extending to service related storage keys, here we publish a keyvals state trace format with a full range of 0x00..00 to 0xFF..FF in traces while leaving developer-friendly state_snapshots that focus on the C1-C15. With both state dumps, we can have teams collaborate:

• deriving the stateroot from key-value pair combinations (which match the blocks parent state root) in traces
• making sure values in traces correspond to the JAM codec encoding of the data in state_snapshots

Implementation of bootstrap service code

• main.rs contains an implementation of the above bootstrap service, which is included in the genesis state
  • The refine service expects a codehash (32 bytes) starting at 0xFEFF0004
  • The accumulate does a new and then a write
• bootstrapblob.pvm has the disassembleable code (see below polkatool) with "magic bytes"
• bootstrap.pvm has the JAM-ready code blob (no magic bytes). We used polkatool to do this, with PR #190 actually mapping main.rs into the above. See links: Building
  JAM Services in Rust for background

Our test does the following:

• submits a few service code blobs (fib, trib, megatron) in 3 work packages using the bootstrap service "0"
• for each work package, we retrieve the new service indexes left by the write after "rho" is cleared (the service has been accumulated)
• our test then runs work packages through fib + trib. Our next goal is to do ordered accumulation with queues.