Antalya 25.8 - Skip crash report send path when disabled

[CarlosFelipeOR]

Fixes #1437

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CI/CD Options

Exclude tests:

• Fast test
• Integration Tests
• Stateless tests
• Stateful tests
• Performance tests
• All with ASAN
• All with TSAN
• All with MSAN
• All with UBSAN
• All with Coverage
• All with Aarch64
• All Regression
• Disable CI Cache

Regression jobs to run:

• Fast suites (mostly <1h)
• Aggregate Functions (2h)
• Alter (1.5h)
• Benchmark (30m)
• ClickHouse Keeper (1h)
• Iceberg (2h)
• LDAP (1h)
• Parquet (1.5h)
• RBAC (1.5h)
• SSL Server (1h)
• S3 (2h)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [3c82aea]

[CarlosFelipeOR]

QA Verification

Tested the fix by sending kill -SEGV to the server process and checking the crash logs.

Before fix (PR #1387)

The crash handler attempts to send the report and throws a BAD_ARGUMENTS exception due to the empty endpoint:

<Information> CrashWriter: Sending crash report
<Information> CrashWriter: Cannot send a crash report: Code: 36. DB::Exception: Empty protocol in the URL. (BAD_ARGUMENTS)

After fix (this PR)

Version: 25.8.16.20001.altinityantalya

The crash log shows the standard signal handling output with no CrashWriter activity at all:

2026.02.20 18:35:52.823928 [ 2377910 ] {} <Trace> BaseDaemon: Received signal 11
2026.02.20 18:35:52.824021 [ 2377910 ] {} <Fatal> BaseDaemon: ########## Short fault info ############
2026.02.20 18:35:52.824038 [ 2377910 ] {} <Fatal> BaseDaemon: (version 25.8.16.20001.altinityantalya, build id: 6FA7FC38FA897E6DA8734F7A2B6C85FEC76A475A, git hash: 2a4ea1369360e1941255b545c05a6cc1e46d4ee3, architecture: x86_64) (from thread 2377876) Received signal 11
2026.02.20 18:35:52.824043 [ 2377910 ] {} <Fatal> BaseDaemon: Signal description: Segmentation fault

No CrashWriter: Sending crash report or CrashWriter: Cannot send a crash report lines in the log.

Result

The CrashWriter instance is no longer created when crash reporting is disabled, so the send path is fully skipped. No exception, no misleading log noise.

Fixes #1437