[wip][fm] export fm state snapshot thingy - #11024

control: job assigned to worker 01KZCKJ5GMM0S2GW9PSJ3HWDPJ [factory aws, i-08fa1ec73f6a6da8e] (queued for 53 s)
...
task: starting task 0: "setup"
task: process exited: duration 4103 ms, exit code 0
...
task: starting task 1: "rust-toolchain"
task: process exited: duration 17622 ms, exit code 0
...
task: starting task 2: "authentication"
task: process exited: duration 20 ms, exit code 0
...
task: starting task 3: "clone repository"
task: process exited: duration 10905 ms, exit code 0
...
task: starting task 4: "build"
...
| error: missing comma between array elements, expected `,`
|    --> Cargo.toml:107:5
|     |
| 107 |     "nexus/internal-api",
|     |     ^
| 
| real       14.975462751
| user       11.029271524
| sys         1.098177782
| trap        0.001093250
| tflt        0.039803554
| dflt        0.043775885
| kflt        0.023713668
| lock        0.051566800
| slp        17.730268577
| lat         0.040654233
| stop        0.000340130
task: process exited: duration 15033 ms, exit code 101
|W| found 0 output files
|W| upload error: rule "/work/package.tar.gz" required a match, but was not used