[LIMS-1879] Proposal sample collections and session data

[gfrn]

JIRA ticket: LIMS-1879

Summary:

These endpoints enable a new page displaying all sample collections for a given proposal, as well as new "shortcut" links to the most recent sessions in the front page

Changes:

• Add sessions endpoint
• Add endpoint to get shipments in a given proposal

To test:

• Send a GET request to /sessions, check if the latest EM sessions are returned
• Send a GET request to /sessions?minEndDate=2025-01-01T00:00:00Z, check if sessions that end after January 1st are returned
• Send a GET request to /proposals/bi23047/shipments, check if 5 sample collections are returned

[codecov]

Codecov Report

❌ Patch coverage is 98.11321% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 94.59%. Comparing base (063914b) to head (800a2cc).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/scaup/auth/template.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #21      +/-   ##
==========================================
+ Coverage   94.37%   94.59%   +0.22%     
==========================================
  Files          40       42       +2     
  Lines        1689     1740      +51     
==========================================
+ Hits         1594     1646      +52     
+ Misses         95       94       -1     

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