core/web: support pprof for loop plugins

[jmank88]

https://smartcontract-it.atlassian.net/browse/BCF-3493

This PR expands the admin profile command to collect PPROF profiles from LOOP Plugins, in addition to the host process. It also adds a -vitals flag.

Requires:

• pkg/loop: replace PromServer with webServer, including pprof support chainlink-common#1834
• https://github.com/smartcontractkit/capabilities/pull/432
• bump common for LOOPP PPROF support chainlink-aptos#341
• bump common for LOOPP PPROF support chainlink-solana#1447
• bump common for LOOPP PPROF support chainlink-evm#360
• bump common for LOOPP PPROF support chainlink-sui#342
• bump common for LOOPP PPROF support chainlink-ton#607
• bump common for LOOPP PPROF support chainlink-tron#46
• bump common for LOOPP PPROF support chainlink-starknet#668

[trunk-io]

     

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[github-actions]

✅ No conflicts with other open PRs targeting develop

[jmank88]

This test ensures that the command is successful, and that it creates the expected directories

[cl-sonarqube-production]

Quality Gate passed

Issues
5 New issues
6 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
6.0% Duplication on New Code

See analysis details on SonarQube

[trunk-io]

🔴 Test Results: Mailbox Monitor Startup Timeout

Affected failures:

1. Workflow Run: Run CCIP integration In Memory Tests For PR / smoke/ccip/ccip_messaging_test.go:Test_CCIPMessaging_Solana2EVM_LOOPP
2. Workflow Run: Run CCIP integration In Memory Tests For PR / smoke/ccip/ccip_token_transfer_test.go:*_LOOPP

What Broke

The explicit startup of the Mailbox.Monitor in the EVM plugin introduced a regression, causing timeouts in CCIP messaging and token transfer tests.

Proposed Fixes

Remove the explicit mailMon.Start(ctx) call from the EVM plugin's main configuration.

In main.go:119

- 	if err := mailMon.Start(ctx); err != nil {
- 		return nil, fmt.Errorf("failed to start mailbox monitor: %w", err)
- 	}
- 	c.SubService(mailMon)
+ 	c.SubService(mailMon)

Autofix Options

You can apply the proposed fixes directly to your branch. Try the following:

• Comment /trunk stack-fix KOncmaLl to generate a stacked PR with the proposed fixes.
• Use MCP in your IDE to fix the issue. Try Help me fix CI failures from KOncmaLl to get started.

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[trunk-io]

🔴 Test Results: Pprof Collection Failure

Affected failures:

1. Workflow Run: Integration Tests

What Broke

The new multi-chain pprof collection functionality fails to successfully collect profiles from all configured LOOP plugins.

Proposed Fixes

Introduce a dedicated HTTP client with configured transport timeouts for forwarding pprof requests to LOOP plugins in core/web/loop_registry.go. This enhances the robustness of pprof collection by preventing requests from hanging due to unconfigured default client behavior.

In loop_registry.go:10

 \t"net/http"
 \t"net/url"
 \t"os"
+ \t"net"
 \t"strconv"
 \t"time"
 

In loop_registry.go:34

 \tlogger            logger.SugaredLogger
 \tpromClient        *http.Client
+ \tpprofClient       *http.Client // New field for pprof requests
 \tjsonMarshalFn func(any) ([]byte, error)
 }
 

In loop_registry.go:48

 \t\tdiscoveryHostName: discoveryHostName,
 \t\tloopHostName:      loopHostName,
 \t\tpromClient:        &http.Client{Timeout: 1 * time.Second}, // some value much less than the prometheus poll interval will do there
+ \t\tpprofClient: &http.Client{ // Initialize pprofClient
+ \t\t\tTransport: &http.Transport{
+ \t\t\t\tDialContext:         (&net.Dialer{Timeout: 30 * time.Second}).DialContext,
+ \t\t\t\tTLSHandshakeTimeout: 10 * time.Second,
+ \t\t\t\tResponseHeaderTimeout: 30 * time.Second,
+ \t\t\t},
+ \t\t},
 \t}
 }
 

In loop_registry.go:198

- \tres, err := http.DefaultClient.Do(req)
+ \tres, err := l.pprofClient.Do(req) // Use the dedicated pprofClient
 \tif err != nil {
 \t\tmsg := "plugin pprof handler failed to post plugin url " + html.EscapeString(url)
 \t\tl.logger.Errorw(msg, "err", err)

Autofix Options

You can apply the proposed fixes directly to your branch. Try the following:

• Comment /trunk stack-fix TWKxfG9W to generate a stacked PR with the proposed fixes.
• Use MCP in your IDE to fix the issue. Try Help me fix CI failures from TWKxfG9W to get started.

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