Implement Redfish power-state retrieval and reset control

[LRitzdorf]

This PR adds a new power subcommand, which has three functions:

• Query node power states (default behavior)
• Query supported Redfish reset types (-l flag)
• Request that the node perform a particular type of reset (-r <ResetType> flag)

At the moment, this relies on the YAML output from the collect subcommand, but doesn't actually need most of the information — it just needs to be able to look up a node's BMC IP and its index within the BMC's Systems list, given an xname (or other ID). In the future, this could probably be accomplished via an SMD query, retaining SMD as the single source of truth.

Also, a bmc_index field is added to the InventoryDetail struct used by collect. This is used by power, and is also sent to SMD (though it should be ignored by the latter).

[davidallendj]

Would you mind adding a few lines on how to use the command? I'm not sure

I'm trying the examples with magellan power --help and not exactly sure what the arguments should be. I'd assume the node ID should be something stored in SMD?

[allend@re-head magellan]$ ./magellan power x3000c0s0b0n0 -l
{"level":"info","time":"2025-07-28T13:23:03-06:00","message":"parsing default inventory file from 'collect': "}
{"level":"error","error":"open : no such file or directory","time":"2025-07-28T13:23:03-06:00","message":"failed to read collected inventory from "}
{"level":"error","error":"open : no such file or directory","time":"2025-07-28T13:23:03-06:00","message":"failed to parse inventory file "}

I can see that the x3000c0s0b0n0 node is stored in SMD with ochami smd component get -F json-pretty.

[LRitzdorf]

That's the correct syntax, but as the error logs show, it's trying to parse a nonexistent inventory file. That needs to be generated by collect, and the resulting filename passed to power via the -f/--inventory-file flag. This is how we obtain the node list for now — in the future, we'll likely want to query SMD directly, though I'm still looking into how exactly we can retrieve the information we need.

[davidallendj]

Can you rebase with the latest changes to main?

[davidallendj]

LGTM