docs: add stripe subscription lifecycle spec + implementation plan

Captures the agreed design for Stripe webhook handling, 5-day grace
period with branded day-3/day-5 reminders, and Stripe Customer Portal
as the single subscription-management surface. Updates payments rules
to match and ignores .worktrees/ for isolated implementation work.
This commit is contained in:
Ovidiu U
2026-04-23 10:05:50 +01:00
parent 19fc61a0a3
commit bf013926c0
4 changed files with 1410 additions and 28 deletions

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