Fetch library ASP and include in member path for CCSID conversion

[buzzia2001]

Changes

During the save, the iasp was not included in the calculation of the IFS path, so run the attr command failed.

How to test this PR

1. open a source member on iASP
2. save it
3. in output log now you should see something similar:

[2026-07-18 15:38:47.627] /usr/bin/attr -p /WHATANIASP/QSYS.LIB/SAMPLEIASP.LIB/DUMMYSRCPF.FILE CCSID
[2026-07-18 15:38:47.930] {
    "code": 0,
    "signal": null,
    "stdout": "CCSID=280",
    "stderr": ""
}

Checklist

• have tested my change
• have created one or more test cases
• updated relevant documentation
• Remove any/all console.logs I added
• have added myself to the contributors' list in CONTRIBUTING.md

[sebjulliand]

Good catch, thanks @buzzia2001 !