Add objects to analysis file before insert

[samuelbray32]

Description

Fixes #1107:

• add position and velocity object to the analysis nwb file before inserting to AnalysisNwbfile
• prevents mismatched checksum/size from altering file after insert

Checklist:

• No This PR should be accompanied by a release: (yes/no/unsure)
• NA If release, I have updated the CITATION.cff
• No This PR makes edits to table definitions: (yes/no)
• NA If table edits, I have included an alter snippet for release notes.
• NA If this PR makes changes to position, I ran the relevant tests locally.
• I have updated the CHANGELOG.md with PR number and description.
• NA I have added/edited docs/notebooks to reflect the changes