chore(deps): update github.com/elastic/go-json-schema-generate digest to c708d18 (main)

[elastic-renovate-prod]

This PR contains the following updates:

Package	Type	Update	Change
github.com/elastic/go-json-schema-generate	indirect	digest	ec19b88 → c708d18

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[github-actions]

TL;DR

check-ci fails at compile time after this Renovate bump because go generate (run by mage check:ci) uses dev-tools/go.mod and the newer go-json-schema-generate digest changes generated timestamp field types, which no longer match internal/pkg/model/ext.go.

Remediation

• Update this PR to include the generator output and compatibility fixes in internal/pkg/model/ext.go (or pin github.com/elastic/go-json-schema-generate back to ec19b88 if that type change is not intended in this PR).
• Re-run mage check:ci after the update.

Investigation details

Root Cause

mage check:ci runs Generate before Check.Fix (magefile.go:625-628), and generation is explicitly wired to dev-tools/go.mod (main.go:5).

This PR updates github.com/elastic/go-json-schema-generate in dev-tools/go.mod, so the generated model types differ from what internal/pkg/model/ext.go expects:

• ext.go:15,25 call time.Parse(..., m.Timestamp) (expects string)
• ext.go:20,30 assign t.Format(...) into m.Timestamp (expects string)
• ext.go:57,70 assign RetiredAt: "" (expects string)

The Buildkite compile errors show those fields are generated as time.Time under this dependency version, producing type mismatches.

Evidence

• Build: https://buildkite.com/elastic/fleet-server/builds/16453
• Job/step: :white_check_mark: Run check-ci (.buildkite/scripts/check_ci.sh)
• Key log excerpt:

internal/pkg/model/ext.go:15:38: cannot use m.Timestamp (variable of struct type time.Time) as string value in argument to time.Parse
internal/pkg/model/ext.go:20:16: cannot use t.Format(time.RFC3339Nano) (value of type string) as time.Time value in assignment
internal/pkg/model/ext.go:57:15: cannot use "" (untyped string constant) as time.Time value in struct literal
Error: running "go fix ./..." failed with exit code 1

Verification

• Not run locally in this workflow; analysis is based on the provided Buildkite logs and PR diff.

Follow-up

No existing flaky-test issue matched this failure pattern (label:"flaky-test" + check-ci returned no hits), and this is not a flaky signature—it is a hard compile-time type mismatch.

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What is this? | From workflow: PR Buildkite Detective

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