[observer] Isolate reporter

[CelianR]

What does this PR do?

This isolates the reporter component.

• Removed HTML reporter (useless)
• ℹ️ The testbench code will move when we will isolate the testbench code

Extra changes

• Restore rate annotations in live events: When the reporter was isolated, EventReporter lost access to eng.Storage() (needed to compute log rate changes in event messages). Fixed via a new StorageConsumer interface in reporter/def — the observer calls SetStorage(eng.Storage()) on any reporter that implements it during wiring. No circular Fx dependency.
• Updated allium: Corrected NonBlocking invariant (send is synchronous, not goroutine-delegated) and updated RateAnnotations invariant to reflect the StorageConsumer pattern.
• Moved constants: Moves constants to constants.go.

Motivation

Describe how you validated your changes

Additional Notes

[dd-octo-sts]

Gitlab CI Configuration Changes

Updated: .gitlab-ci.yml

⚠️ Diff too large to display on Github.

Changes Summary

Removed	Modified	Added	Renamed
5	467	24	0

Updated: .gitlab/childs/smp-regression-child-pipeline.yml

⚠️ Diff too large to display on Github.

Changes Summary

Removed	Modified	Added	Renamed
0	3	3	0

Updated: .gitlab/distribution.yml

⚠️ Diff too large to display on Github.

Changes Summary

Removed	Modified	Added	Renamed
2	2	7	0

ℹ️ Diff available in the job log.

[CelianR]

This will move when we will refactor the testbench

[datadog-prod-us1-5]

🎯 Code Coverage (details)
• Patch Coverage: 11.11%
• Overall Coverage: 50.37% (-0.10%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 28d1889 | Docs | Datadog PR Page | Give us feedback!}

[dd-octo-sts]

Static quality checks

✅ Please find below the results from static quality gates
Comparison made with ancestor e5b320d
📊 Static Quality Gates Dashboard
🔗 SQG Job
SOME SIZE DELTAS ARE N/A (ANCESTOR METRICS NOT YET AVAILABLE). RETRY JOB

Successful checks

Info

	Quality gate	Change	Size (prev → curr → max)
✅	agent_deb_amd64	N/A	N/A → 741.887 → 750.310
✅	agent_deb_amd64_fips	N/A	N/A → 700.059 → 702.690
✅	agent_heroku_amd64	N/A	N/A → 309.908 → 313.960
✅	agent_msi	N/A	N/A → 609.001 → 623.540
✅	agent_rpm_amd64	N/A	N/A → 741.870 → 750.280
✅	agent_rpm_amd64_fips	N/A	N/A → 700.043 → 702.670
✅	agent_rpm_arm64	N/A	N/A → 719.925 → 724.050
✅	agent_rpm_arm64_fips	N/A	N/A → 681.134 → 684.460
✅	agent_suse_amd64	N/A	N/A → 741.870 → 750.280
✅	agent_suse_amd64_fips	N/A	N/A → 700.043 → 702.670
✅	agent_suse_arm64	N/A	N/A → 719.925 → 724.050
✅	agent_suse_arm64_fips	N/A	N/A → 681.134 → 684.460
✅	docker_agent_amd64	N/A	N/A → 802.241 → 805.870
✅	docker_agent_arm64	N/A	N/A → 805.085 → 809.730
✅	docker_agent_jmx_amd64	N/A	N/A → 993.161 → 996.590
✅	docker_agent_jmx_arm64	N/A	N/A → 984.784 → 989.410
✅	docker_cluster_agent_amd64	N/A	N/A → 206.611 → 207.600
✅	docker_cluster_agent_arm64	N/A	N/A → 220.635 → 221.150
✅	docker_cws_instrumentation_amd64	N/A	N/A → 7.142 → 7.180
✅	docker_cws_instrumentation_arm64	N/A	N/A → 6.689 → 6.920
✅	docker_host_profiler_amd64	N/A	N/A → 301.149 → 315.800
✅	docker_host_profiler_arm64	N/A	N/A → 312.696 → 327.400
✅	docker_dogstatsd_amd64	N/A	N/A → 39.398 → 39.540
✅	docker_dogstatsd_arm64	N/A	N/A → 37.628 → 38.080
✅	dogstatsd_deb_amd64	N/A	N/A → 30.052 → 30.770
✅	dogstatsd_deb_arm64	N/A	N/A → 28.193 → 29.270
✅	dogstatsd_rpm_amd64	N/A	N/A → 30.052 → 30.770
✅	dogstatsd_suse_amd64	N/A	N/A → 30.052 → 30.770
✅	iot_agent_deb_amd64	N/A	N/A → 44.486 → 44.970
✅	iot_agent_deb_arm64	N/A	N/A → 41.466 → 42.560
✅	iot_agent_deb_armhf	N/A	N/A → 42.206 → 42.740
✅	iot_agent_rpm_amd64	N/A	N/A → 44.486 → 44.970
✅	iot_agent_suse_amd64	N/A	N/A → 44.486 → 44.970

On-wire sizes (compressed)

	Quality gate	Change	Size (prev → curr → max)
✅	agent_deb_amd64	N/A	N/A → 175.579 → 179.160
✅	agent_deb_amd64_fips	N/A	N/A → 167.289 → 174.440
✅	agent_heroku_amd64	N/A	N/A → 75.146 → 80.310
✅	agent_msi	N/A	N/A → 140.910 → 148.730
✅	agent_rpm_amd64	N/A	N/A → 177.574 → 182.080
✅	agent_rpm_amd64_fips	N/A	N/A → 168.580 → 174.140
✅	agent_rpm_arm64	N/A	N/A → 159.655 → 163.610
✅	agent_rpm_arm64_fips	N/A	N/A → 151.943 → 156.850
✅	agent_suse_amd64	N/A	N/A → 177.574 → 182.080
✅	agent_suse_amd64_fips	N/A	N/A → 168.580 → 174.140
✅	agent_suse_arm64	N/A	N/A → 159.655 → 163.610
✅	agent_suse_arm64_fips	N/A	N/A → 151.943 → 156.850
✅	docker_agent_amd64	N/A	N/A → 267.994 → 272.990
✅	docker_agent_arm64	N/A	N/A → 255.004 → 261.470
✅	docker_agent_jmx_amd64	N/A	N/A → 336.658 → 341.610
✅	docker_agent_jmx_arm64	N/A	N/A → 319.661 → 326.050
✅	docker_cluster_agent_amd64	N/A	N/A → 72.418 → 73.460
✅	docker_cluster_agent_arm64	N/A	N/A → 67.868 → 68.680
✅	docker_cws_instrumentation_amd64	N/A	N/A → 2.999 → 3.330
✅	docker_cws_instrumentation_arm64	N/A	N/A → 2.729 → 3.090
✅	docker_host_profiler_amd64	N/A	N/A → 110.758 → 125.600
✅	docker_host_profiler_arm64	N/A	N/A → 105.093 → 120.000
✅	docker_dogstatsd_amd64	N/A	N/A → 15.247 → 15.870
✅	docker_dogstatsd_arm64	N/A	N/A → 14.560 → 14.890
✅	dogstatsd_deb_amd64	N/A	N/A → 7.948 → 8.830
✅	dogstatsd_deb_arm64	N/A	N/A → 6.830 → 7.750
✅	dogstatsd_rpm_amd64	N/A	N/A → 7.958 → 8.840
✅	dogstatsd_suse_amd64	N/A	N/A → 7.958 → 8.840
✅	iot_agent_deb_amd64	N/A	N/A → 11.706 → 13.210
✅	iot_agent_deb_arm64	N/A	N/A → 10.004 → 11.620
✅	iot_agent_deb_armhf	N/A	N/A → 10.210 → 11.780
✅	iot_agent_rpm_amd64	N/A	N/A → 11.723 → 13.230
✅	iot_agent_suse_amd64	N/A	N/A → 11.723 → 13.230

[CelianR]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. What shall we delve into next?

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