Data provider simplification, tests, and documentation (#1997)

* Ignore env.test from source control

* Simplification of providers interface

* Synth tests

* Update money to use new find rates method

* Remove unused issues code

* Additional issue feature removals

* Update price data fetching and tests

* Update documentation for providers

* Security test fixes

* Fix self host test

* Update synth usage data access

* Remove AI pr schema changes

test/vcr_cassettes/synth/usage.yml

@@ -0,0 +1,82 @@
+---
+http_interactions:
+- request:
+    method: get
+    uri: https://api.synthfinance.com/user
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      Authorization:
+      - Bearer <SYNTH_API_KEY>
+      X-Source:
+      - maybe_app
+      X-Source-Type:
+      - managed
+      User-Agent:
+      - Faraday v2.12.2
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Date:
+      - Sat, 15 Mar 2025 22:18:47 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Transfer-Encoding:
+      - chunked
+      Connection:
+      - keep-alive
+      Cache-Control:
+      - max-age=0, private, must-revalidate
+      Etag:
+      - W/"4ec3e0a20895d90b1e1241ca67f10ca3"
+      Referrer-Policy:
+      - strict-origin-when-cross-origin
+      Rndr-Id:
+      - 54c8ecf9-6858-4db6
+      Strict-Transport-Security:
+      - max-age=63072000; includeSubDomains
+      Vary:
+      - Accept-Encoding
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - SAMEORIGIN
+      X-Permitted-Cross-Domain-Policies:
+      - none
+      X-Render-Origin-Server:
+      - Render
+      X-Request-Id:
+      - a4112cfb-0eac-4e3e-a880-7536d90dcba0
+      X-Runtime:
+      - '0.007036'
+      X-Xss-Protection:
+      - '0'
+      Cf-Cache-Status:
+      - DYNAMIC
+      Report-To:
+      - '{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=Rt0BTtrgXzYjWOQFgb%2Bg6N4xKvXtPI66Q251bq9nWtqUhGHo17GmVVAPkutwN7Gisw1RmvYfxYUiMCCxlc4%2BjuHxbU1%2BXr9KHy%2F5pUpLhgLNNrtkqqKOCW4GduODnDbw2I38Rocu"}],"group":"cf-nel","max_age":604800}'
+      Nel:
+      - '{"success_fraction":0,"report_to":"cf-nel","max_age":604800}'
+      Speculation-Rules:
+      - '"/cdn-cgi/speculation"'
+      Server:
+      - cloudflare
+      Cf-Ray:
+      - 920f637d1fe8eb68-ORD
+      Alt-Svc:
+      - h3=":443"; ma=86400
+      Server-Timing:
+      - cfL4;desc="?proto=TCP&rtt=28779&min_rtt=27036&rtt_var=11384&sent=5&recv=6&lost=0&retrans=0&sent_bytes=2828&recv_bytes=878&delivery_rate=107116&cwnd=203&unsent_bytes=0&cid=52bc39ad09dd9eff&ts=145&x=0"
+    body:
+      encoding: ASCII-8BIT
+      string: '{"id":"user_3208c49393f54b3e974795e4bea5b864","email":"test@maybe.co","name":"Test
+        User","plan":"Business","api_calls_remaining":1200,"api_limit":5000,"credits_reset_at":"2025-04-01T00:00:00.000-04:00","current_period_start":"2025-03-01T00:00:00.000-05:00"}'
+  recorded_at: Sat, 15 Mar 2025 22:18:47 GMT
+recorded_with: VCR 6.3.1