[SPIKE] Define technical approach for sending a CHECK OUT initiated patron loan notice with multiple items

Note: Split last two scenarios into a separate issue – CIRC-462.

As a library user, I want one email that includes all information and items from my library based on an action [listed below*] because I do not want to receive several emails or an email for each item.

In summary, notices are sent when a check out session ends, which includes:

• When FOLIO operator hits End Session on Check-out App Screen
• When FOLIO operator scans (or enters) a new Patron ID, which starts a new check out session
• When a check out session times out due to inactivity
• When FOLIO operator closes browser, which closes the existing session CIRC-462
• When FOLIO operator logs out, which closes the existing session CIRC-462

Scenarios

Scenario 1 - Check out

• FOLIO operator opens check out screen
• Then enters the barcode or scans Patron A's info
• Then scans Patron A's 10 items
• Then enters the barcode or scans Patron B's info (switching to new patron/new session, so notice is sent to Patron A with their 10 items)
• Then scans Patron B's 3 items
• Then enters the barcode or scans Patron C's info (switching to new patron/new session, so notice is sent to Patron B with their 3 items)
• Then scans Patron C's 8 items
• Then ends session (notice is sent to Patron C with their 8 items)

Scenario 2 - If a check out session is ended in between a patron's check out (unlikely)

• FOLIO operator opens check out screen
• Then enters the barcode or scans Patron A's info
• Then scans Patron A's 7 of 10 items
• Then ends session (notice is sent to Patron A with their 7 items)
• Then starts a new session
• Then scans Patron A's remaining 3 of 10 items
• Then enters the barcode or scans Patron B's info (switching to new patron/new session, so notice is sent to Patron A with their remaining 3 items)
• Then scans Patron B's 3 items
• Then ends session (notice is sent to Patron B with their 3 items)

Scenario 3 - If a check out session times out

• FOLIO operator opens check out screen
• Then enters the barcode or scans Patron A's info
• Then scans Patron A's 10 items
• Then 30 minutes expires
• Session automatically times out and ends due to inactivity based on tenant configuration* (notice is sent to Patron A with their 10 items)

*Settings > Circulation > Other settings > Automatically end checkout session after period of inactivity [ ] minutes

Requirements

• Must support user-initiated loan notices (e.g. checkout items in one session)
• No expectations of sending an email that includes multiple notice types (e.g. an email should not include loan info and request info)
• No expectations of sending an email that includes multiple templates
• Items may span different loan policies

Spike Deliverables

• Technical approach must address scenarios outlined in UICIRC-238 and https://docs.google.com/document/d/1OylEJ6eDx8h7PvuwBa2jKO4dKrgDjnQ4H13oXA57TnY/edit#heading=h.hbd6j2t3hjc9 (see Problem 1, 2, 3 tables) . Please add approach to JIRA as a comment and present to team for approval
• Generate or update user stories based on approved technical approach
• Identify dependencies