fix: Retry adapter flags requests on 502 and 504

[marandaneto]

Summary

• retry SDK compliance adapter /flags/?v=2 requests on HTTP 502 and 504 using the adapter max_retries setting
• add focused adapter tests for 502 -> 200 and 504 -> 200 flag evaluation retries

Validation

• flutter test sdk_compliance_adapter/test/flags_retry_test.dart
• flutter analyze sdk_compliance_adapter/lib/adapter_server.dart sdk_compliance_adapter/test/flags_retry_test.dart

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix: retry adapter flags requests on 502..." | Re-trigger Greptile}

[github-actions]

posthog-flutter Compliance Report

Date: 2026-07-02 11:51:10 UTC
Duration: 96822ms

✅ All Tests Passed!

45/45 tests passed

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Capture Tests

✅ 29/29 tests passed

View Details

Test	Status	Duration
Format Validation.Event Has Required Fields	✅	140ms
Format Validation.Event Has Uuid	✅	118ms
Format Validation.Event Has Lib Properties	✅	115ms
Format Validation.Distinct Id Is String	✅	115ms
Format Validation.Token Is Present	✅	115ms
Format Validation.Custom Properties Preserved	✅	116ms
Format Validation.Event Has Timestamp	✅	116ms
Retry Behavior.Retries On 503	✅	5328ms
Retry Behavior.Does Not Retry On 400	✅	2117ms
Retry Behavior.Does Not Retry On 401	✅	2118ms
Retry Behavior.Respects Retry After Header	✅	8121ms
Retry Behavior.Implements Backoff	✅	15447ms
Retry Behavior.Retries On 500	✅	5225ms
Retry Behavior.Retries On 502	✅	5226ms
Retry Behavior.Retries On 504	✅	5224ms
Retry Behavior.Max Retries Respected	✅	15444ms
Deduplication.Generates Unique Uuids	✅	125ms
Deduplication.Preserves Uuid On Retry	✅	5224ms
Deduplication.Preserves Uuid And Timestamp On Retry	✅	10327ms
Deduplication.Preserves Uuid And Timestamp On Batch Retry	✅	5227ms
Deduplication.No Duplicate Events In Batch	✅	124ms
Deduplication.Different Events Have Different Uuids	✅	115ms
Compression.Sends Gzip When Enabled	✅	116ms
Batch Format.Uses Proper Batch Structure	✅	113ms
Batch Format.Flush With No Events Sends Nothing	✅	108ms
Batch Format.Multiple Events Batched Together	✅	125ms
Error Handling.Does Not Retry On 403	✅	2117ms
Error Handling.Does Not Retry On 413	✅	2118ms
Error Handling.Retries On 408	✅	5225ms

Feature_Flags Tests

✅ 16/16 tests passed

View Details

Test	Status	Duration
Request Payload.Request With Person Properties Device Id	✅	12ms
Request Payload.Flags Request Uses V2 Query Param	✅	10ms
Request Payload.Flags Request Hits Flags Path Not Decide	✅	9ms
Request Payload.Flags Request Omits Authorization Header	✅	9ms
Request Payload.Token In Flags Body Matches Init	✅	9ms
Request Payload.Groups Round Trip	✅	10ms
Request Payload.Groups Default To Empty Object	✅	9ms
Request Payload.Person Properties Distinct Id Auto Populated When Caller Omits It	✅	9ms
Request Payload.Disable Geoip False Propagates As Geoip Disable False	✅	10ms
Request Payload.Disable Geoip Omitted Defaults To False	✅	9ms
Request Payload.Flag Keys To Evaluate Contains Only Requested Key	✅	9ms
Request Lifecycle.No Flags Request On Init Alone	✅	4ms
Request Lifecycle.No Flags Request On Normal Capture	✅	112ms
Request Lifecycle.Two Flag Calls Produce Two Remote Requests	✅	16ms
Request Lifecycle.Mock Response Value Is Returned To Caller	✅	9ms
Side Effect Events.Get Feature Flag Captures Feature Flag Called Event	✅	115ms

[greptile-apps]

_{Reviews (2): Last reviewed commit: "chore: remove unnecessary changeset" | Re-trigger Greptile}