[TTAHUB-5332] Approved ARs and TR sessions by goal category graph BE (#3654)

* be for graph

* add missing tests and fix TR date logic

* Potential fix for pull request finding

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* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* test: set explicit post-cutoff goal dates in approved AR/TR widget test

* fix: scope TR category query via event join

* pre check for count

* add category combined totals

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Combine events into main query

* cast int

* Fix BE tests

* make sure both reports functions gather from recipient

* add missing coverage

* change to activity start date

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: 3 people