MSEED files support

[Gautzilla]

🐳 What's new?

This PR adds support for accessing MiniSEED data within the osekit ecosystem.

🐳 How does it work?

The metadata/data access is based on ObsPy.

The osekit AudioFileManager has been tweaked so that reading .mseed info/data use ObsPy rather than soundlib.

As ObsPy doesn't access data lazily with frame indexes, the AudioFileManager loads the entire file data and returns the requested frames afterwards.

🐳 Note

The MiniSEED data seems to be stored as large integer values (at least, that is the case with the OOI dataset). Hence, I'd recommend normalizing the data with Normalization.PEAK to get it back into the WAV data [0.,1.] range.

resolve #282

[Gautzilla]

I'm still trying to figure out a way of creating small mseed files on the fly for adding the feature to the test suite.
Aside from that, the feature can be tested if you want to!

[mathieudpnt]

I think @cazaudo is better suited to review this PR.

[Gautzilla]

Note for 2026:

I tried to isolate the obspy-dependent part to keep basic users from the obspy/windows hell.

I still have some tests that don't pass: maybe it is because i changed the data returned by get_data() to a 2D array?

I'll have to look back at it in january!

[Gautzilla]

@cazaudo I had to rework this PR since ObSpy was impossible to install back on my PC (I don't even know how I proceeded to do so in september).

I switched the obspy dependency to an optional dependency, which has to be specificaly declared when installing osekit (see the updated doc on Acoustock).

Then, I refactored a bit the audio module (see the new audio_backend module) so that a new AudioBackend class redirects the audio backend to either the SoundFile backend (which relies on soundfile and manages classic audio formats) or the MseedBackend which manages MSEED files and checks wether the obspy package has been installed.

I'm really not familiar enough with the mseed format to know if the file reading is correct in edge cases (I'm not sure how traces should work), so I come back to you to see if everything works as intended!

The branch still needed a redesign after the first approval