feat: v1.20 with check.ipfs.network button

[lidel]

What

This PR adds Check CID retrievability button to HTTP 504 error pages:

It adds --diagnostic-service-url configuration option to allow overriding the default service URL (https://check.ipfs.network)

Why?

My bad, I missed the fact that by default DiagnosticServiceURL is not set.

I'm going to ship this as v1.19.1 and then open PR in waterworks-infra to disable nginx proxy_intercept_errors so we can see these modern error pages.

[lidel]

Pebble bump makes this a bigger change. Will switch to v1.20

[github-actions]

Suggested version: 1.20.0

Comparing to: v1.19.0 (diff)

Changes in configuration file(s):

diff --git a/go.mod b/go.mod
index a477d1e..1cbe5fc 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.24.0
 
 require (
 	contrib.go.opencensus.io/exporter/prometheus v0.4.2
-	github.com/cockroachdb/pebble v1.1.4
+	github.com/cockroachdb/pebble/v2 v2.1.0
 	github.com/coreos/go-systemd/v22 v22.5.0
 	github.com/dgraph-io/badger/v4 v4.5.1
 	github.com/dustin/go-humanize v1.0.1
@@ -18,7 +18,7 @@ require (
 	github.com/ipfs/go-ds-badger4 v0.1.8
 	github.com/ipfs/go-ds-flatfs v0.5.5
 	github.com/ipfs/go-ds-leveldb v0.5.2
-	github.com/ipfs/go-ds-pebble v0.4.4
+	github.com/ipfs/go-ds-pebble v0.5.3
 	github.com/ipfs/go-log/v2 v2.8.1
 	github.com/ipfs/go-metrics-interface v0.3.0
 	github.com/ipfs/go-metrics-prometheus v0.1.0
@@ -52,19 +52,21 @@ require (
 )
 
 require (
-	github.com/DataDog/zstd v1.5.6-0.20230824185856-869dae002e5e // indirect
+	github.com/DataDog/zstd v1.5.7 // indirect
 	github.com/Jorropo/jsync v1.0.1 // indirect
+	github.com/RaduBerinde/axisds v0.0.0-20250419182453-5135a0650657 // indirect
+	github.com/RaduBerinde/btreemap v0.0.0-20250419174037-3d62b7205d54 // indirect
 	github.com/alecthomas/units v0.0.0-20240927000941-0f3dac36c52b // indirect
 	github.com/alexbrainman/goissue34681 v0.0.0-20191006012335-3fc7a47baff5 // indirect
 	github.com/benbjohnson/clock v1.3.5 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/cockroachdb/datadriven v1.0.3-0.20240530155848-7682d40af056 // indirect
+	github.com/cockroachdb/crlib v0.0.0-20241112164430-1264a2edc35b // indirect
 	github.com/cockroachdb/errors v1.11.3 // indirect
-	github.com/cockroachdb/fifo v0.0.0-20240606204812-0bbfbd93a7ce // indirect
 	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
+	github.com/cockroachdb/swiss v0.0.0-20250624142022-d6e517c1d961 // indirect
 	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/crackcomm/go-gitignore v0.0.0-20241020182519-7843d2ba8fdf // indirect
@@ -133,6 +135,7 @@ require (
 	github.com/miekg/dns v1.1.68 // indirect
 	github.com/mikioh/tcpinfo v0.0.0-20190314235526-30a79bb1804b // indirect
 	github.com/mikioh/tcpopt v0.0.0-20190314235656-172688c1accc // indirect
+	github.com/minio/minlz v1.0.1-0.20250507153514-87eb42fe8882 // indirect
 	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/multiformats/go-base32 v0.1.0 // indirect
 	github.com/multiformats/go-base36 v0.2.0 // indirect

gorelease says:

# diagnostics
required module github.com/microcosm-cc/bluemonday@v1.0.23 retracted by module author: Retract older versions as only latest is to be depended upon

# summary
Suggested version: v1.20.0

gocompat says:

HEAD is now at 2b41298 chore: release v1.19.0 (#299)
Previous HEAD position was 2b41298 chore: release v1.19.0 (#299)
Switched to branch 'main'
Your branch is up to date with 'origin/main'.

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