update query template to work with new session-level phenotypic data model

[alyssadai]

• [x] create local db with https://github.com/neurobagel/neurobagel_examples/blob/main/data-upload/pheno-bids-output/example_synthetic_pheno-bids.jsonld for testing new functionality
• [x] update query model: split query parameter for min # sessions into
  • min # pheno sessions
  • min # imaging sessions
• note: we won't have an "any" param cause it gets too complicated (it would need to be exclusive from min_num_pheno_sessions and min_num_imaging_sessions)
• note 2: default for either parameter cannot be 1, or this gets undesirably constrained when user doesn't fill out either field
• [x] update query template
• What do we return for a subject when they match the criteria?
  • Since the session ID of their phenotypic + imaging sessions can be different, we should return both separately + info for both (b/c otherwise, if user only sets an imaging data criteria, the matching sessions have no phenotypic attributes attached which is not useful)
  • [x] Separate entries for each session
  • [x] Per session entry, a new "session_type" key
• [x] in subject-level response, split num_sessions into phenotypic + imaging ses count
• [x] create new data model for session entry in subject_data response field
• [x] update docstrings of functions, remove TODOs
• [x] update tests

Reference query examples:

1. 2+ imaging sessions; imaging modality = T1
2. 2+ pheno sessions; age > 60; assessment = MoCA
3. 2+ imaging sessions; age > 60; assessment = MoCA
4. 2+ imaging sessions; 2+ pheno sessions; age > 60; assessment = MoCA

[surchs]

:rocket: Issue was released in v0.2.0 :rocket: