fix(arns): enforce undername limit

[dtfiedler]

The ANTs provide the sorted array of records in resolution order. We are now enforcing the undername limits and returning a 402 to arns names that are not supported. Additional X-ArNS-Limit and X-ArNS-Index headers are added to indicate where the name/undername is in the list of records returned by the ANT.

❯ curl -I http://localhost:3000 -H 'Host: turtles.example.com'
HTTP/1.1 200 OK
X-Powered-By: Express
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: X-ArNS-Resolved-Id,X-ArNS-TTL-Seconds,X-ArNS-Process-Id,X-ArNS-Resolved-At
X-ArNS-Resolved-Id: 4jBV3ofWh41KhuTs2pFvj-KBZWUkbrbCYlJH0vLA6LM
X-ArNS-TTL-Seconds: 3600
X-ArNS-Process-Id: U2dlP4DMMZFO82tWzcDfcgNGq5aGYY6CU84oeHAfNHE
X-ArNS-Resolved-At: 1731610778844
X-ArNS-Limit: 100
X-ArNS-Index: 0
Cache-Control: public, max-age=3600
Accept-Ranges: bytes
X-Cache: MISS
X-AR-IO-Hops: 1
Content-Type: text/html; charset=utf-8
Content-Length: 5
Date: Thu, 14 Nov 2024 18:59:38 GMT
Connection: keep-alive
Keep-Alive: timeout=5

❯ curl -I http://localhost:3000 -H 'Host: baby_turtles.example.com'
HTTP/1.1 200 OK
X-Powered-By: Express
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: X-ArNS-Resolved-Id,X-ArNS-TTL-Seconds,X-ArNS-Process-Id,X-ArNS-Resolved-At
X-ArNS-Resolved-Id: KmCzrswTGzRTSzNx2oyke2M_x6mSUf5jIOvyItGOnkg
X-ArNS-TTL-Seconds: 3600
X-ArNS-Process-Id: U2dlP4DMMZFO82tWzcDfcgNGq5aGYY6CU84oeHAfNHE
X-ArNS-Resolved-At: 1731610792864
X-ArNS-Limit: 100
X-ArNS-Index: 1
Cache-Control: public, max-age=3600
Accept-Ranges: bytes
X-Cache: MISS
X-AR-IO-Hops: 1
Content-Type: image/jpeg
Content-Length: 577710
Date: Thu, 14 Nov 2024 18:59:53 GMT
Connection: keep-alive
Keep-Alive: timeout=5

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.47%. Comparing base (0d3e2a9) to head (3a1a711).
Report is 15 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #234      +/-   ##
===========================================
+ Coverage    68.46%   68.47%   +0.01%     
===========================================
  Files           33       33              
  Lines         8139     8144       +5     
  Branches       435      435              
===========================================
+ Hits          5572     5577       +5     
  Misses        2565     2565              
  Partials         2        2              

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[dtfiedler]

We'll create an ADR for this before we finalize the implementation. Will keep the PR in draft and link that once created.