fix(stripe): konfigurowalne metody płatności + p24 wyłączone domyślnie

[rico-agent]

Problem

p24 wymaga aktywacji w Stripe Dashboard — bez niej rzuca StripeException dla PLN.
Było hardkodowane ["card","blik","p24"].

Rozwiązanie

• StripeServiceCaller przyjmuje opcjonalny IConfiguration
• Metody płatności czytane z Stripe:AllowedPaymentMethods (gdy ustawione)
• Fallback: GetPaymentMethodsForCurrency() — PLN: card+blik (bez p24)

Konfiguracja

"Stripe": {
  "AllowedPaymentMethods": ["card", "blik", "p24"]
}

lub env var: Stripe__AllowedPaymentMethods__0=card

Testy

✅ 378 passed, 0 failed

[codecov]

Codecov Report

❌ Patch coverage is 22.22222% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.62%. Comparing base (f21d07e) to head (8caa8d0).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ed.Payments.Provider.Stripe/StripeServiceCaller.cs	22.22%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   54.81%   56.62%   +1.81%     
==========================================
  Files         101      101              
  Lines        3399     2877     -522     
  Branches      292      294       +2     
==========================================
- Hits         1863     1629     -234     
+ Misses       1459     1172     -287     
+ Partials       77       76       -1     

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