Care-team, care-action and treatment-history CRUD

Closes open item #4 in CONTINUE.md: patient-treatment-histories,
care_team_members and care_actions had tables and patient relations but no
controller, so nothing outside the model could write to them.

Adds index, create and edit screens and routes for each of the three, and wires
them into the existing patient-profile tabs.

Verified: the full suite is green with this work in the tree — 526 tests,
1617 assertions, clean OK with no risky or failing tests. The suite result line
in CONTINUE.md is updated to match, so the next session does not read a stale
number.

Authorship: this work belongs to the concurrent session, not to the
payment-collection / grant-management session whose commit is 44e334f. It is
committed here at the user's request as a snapshot so it cannot be lost, on the
strength of the green suite run above. It has not been walked in a browser and
has no screenshot evidence of its own.
