chore(aap): appsec.enabled metric

[avara1986]

Send a metric in an interval when appsec is enabled show how has been enabled (RC, code, env_var)

Motivation

Have a recurrent data about saying that appsec is enabled, even when there is no request in the service.

System tests: DataDog/system-tests#4871

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

ddtrace/_trace/tracer.py                                                @DataDog/apm-sdk-api-python
ddtrace/appsec/_constants.py                                            @DataDog/asm-python
ddtrace/appsec/_handlers.py                                             @DataDog/asm-python
ddtrace/appsec/_remoteconfiguration.py                                  @DataDog/asm-python
ddtrace/internal/telemetry/writer.py                                    @DataDog/apm-core-python
ddtrace/settings/asm.py                                                 @DataDog/asm-python
tests/appsec/appsec/test_telemetry.py                                   @DataDog/asm-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 275 ± 4 ms.

The average import time from base is: 277 ± 3 ms.

The import time difference between this PR and base is: -2.0 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.034 ms (0.74%)

ddtrace.bootstrap.sitecustomize 1.360 ms (0.49%)

ddtrace.bootstrap.preload 1.360 ms (0.49%)

ddtrace.internal.remoteconfig.client 0.658 ms (0.24%)

ddtrace 0.675 ms (0.25%)

ddtrace.internal._unpatched 0.031 ms (0.01%)

json 0.031 ms (0.01%)

json.decoder 0.031 ms (0.01%)

re 0.031 ms (0.01%)

enum 0.031 ms (0.01%)

types 0.031 ms (0.01%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-30 14:52:33

Comparing candidate commit ac35ef5 in PR branch avara1986/APPSEC-57895_appsec_enabled_metric with baseline commit 57bc9cd in branch main.

Found 0 performance improvements and 1 performance regressions! Performance is the same for 505 metrics, 4 unstable metrics.

scenario:iastaspectsospath-ospathjoin_aspect

• 🟥 execution_time [+873.038ns; +1004.631ns] or [+14.233%; +16.378%]