COSE signatures over merkle root in the ledger

[maxtropets]

Closes #6449

[achamayou]

@maxtropets ASAN reports a stack use after scope exit in cose_params_string_string, which needs fixing (the simplest is probably to pass the string views as const refs). Please also conduct a run of the performance tests and compare the results with the latest run on main, to confirm the performance impact of this change.

[maxtropets]

Local perf run on the feature branch

    "Commit Latency (sig_ms_interval=1ms)": {
        "latency": {
            "value": 3.570866584777832,
            "high_value": 5.024909973144531,
            "low_value": 1.9223690032958984
        }
    },
    "Commit Latency (sig_ms_interval=16ms)": {
        "latency": {
            "value": 5.190229415893555,
            "high_value": 17.133235931396484,
            "low_value": 1.9614696502685547
        }
    },
    "Commit Latency (sig_ms_interval=256ms)": {
        "latency": {
            "value": 208.73398780822754,
            "high_value": 214.36476707458496,
            "low_value": 136.8558406829834
        }
    },
    "Logging": {
        "throughput": {
            "value": 8089.7,
            "high_value": null,
            "low_value": null
        },
        "memory": {
            "value": 96899072,
            "high_value": 96899072,
            "low_value": null
        }
    },
    "Basic": {
        "memory": {
            "value": 114323456,
            "high_value": 114323456,
            "low_value": null
        },
        "throughput": {
            "value": 9423.1,
            "high_value": null,
            "low_value": null
        }
    },
    "Basic JS": {
        "memory": {
            "value": 114425856,
            "high_value": 114425856,
            "low_value": null
        },
        "throughput": {
            "value": 3572.8,
            "high_value": null,
            "low_value": null
        }
    },
    "Logging JWT": {
        "throughput": {
            "value": 4607.0,
            "high_value": null,
            "low_value": null
        },
        "memory": {
            "value": 96792576,
            "high_value": 96792576,
            "low_value": null
        }
    },
    "Historical Queries": {
        "throughput": {
            "value": 105420.24683629272,
            "high_value": null,
            "low_value": null
        }
    },
    "Basic Multi-Threaded": {
        "memory": {
            "value": 114167808,
            "high_value": 114167808,
            "low_value": null
        },
        "throughput": {
            "value": 9413.1,
            "high_value": null,
            "low_value": null
        }
    }
}

Local perf run on main

{
    "Commit Latency (sig_ms_interval=1ms)": {
        "latency": {
            "value": 2.969062328338623,
            "high_value": 4.170417785644531,
            "low_value": 0.9822845458984375
        }
    },
    "Commit Latency (sig_ms_interval=16ms)": {
        "latency": {
            "value": 4.699850082397461,
            "high_value": 10.979652404785156,
            "low_value": 3.6275386810302734
        }
    },
    "Commit Latency (sig_ms_interval=256ms)": {
        "latency": {
            "value": 207.72992372512817,
            "high_value": 215.41619300842285,
            "low_value": 135.17498970031738
        }
    },
    "Logging": {
        "throughput": {
            "value": 8193.0,
            "high_value": null,
            "low_value": null
        },
        "memory": {
            "value": 96776192,
            "high_value": 96776192,
            "low_value": null
        }
    },
    "Basic": {
        "memory": {
            "value": 114327552,
            "high_value": 114327552,
            "low_value": null
        },
        "throughput": {
            "value": 9187.0,
            "high_value": null,
            "low_value": null
        }
    },
    "Basic JS": {
        "memory": {
            "value": 114053120,
            "high_value": 114053120,
            "low_value": null
        },
        "throughput": {
            "value": 3641.7,
            "high_value": null,
            "low_value": null
        }
    },
    "Logging JWT": {
        "throughput": {
            "value": 4575.6,
            "high_value": null,
            "low_value": null
        },
        "memory": {
            "value": 96587776,
            "high_value": 96587776,
            "low_value": null
        }
    },
    "Historical Queries": {
        "throughput": {
            "value": 104487.27676031936,
            "high_value": null,
            "low_value": null
        }
    },
    "Basic Multi-Threaded": {
        "memory": {
            "value": 114053120,
            "high_value": 114053120,
            "low_value": null
        },
        "throughput": {
            "value": 9317.7,
            "high_value": null,
            "low_value": null
        }
    }
}