FTRS-4045 Implement Performance scripts for dos-ingest & ETL-ODS

[ManithaSrinivasa]

…mance Makefile targets

Description

Context

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[Copilot]

Pull request overview

Adds performance testing tooling under tests/performance/ to support dos-ingest CRUD load tests and ETL-ODS pipeline load/observability workflows.

Changes:

• Introduces a new JMeter test plan for dos-ingest CRUD Organisation GET/PUT testing (DS_Test_Plan.jmx) and updates parameter loading to support per-service APIM workspaces.
• Adds ETL-ODS performance scripts for (a) extracting real organisation IDs from DynamoDB, (b) injecting synthetic FHIR Organisation messages into the transform SQS queue, and (c) fetching/exporting CloudWatch metrics.
• Extends the performance Makefile and READMEs with new targets and usage guidance.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tests/performance/scripts/etl_ods/generate_synthetic_sqs_messages.py	Generates synthetic FHIR Organisation envelopes and sends them to the ETL-ODS transform SQS queue.
tests/performance/scripts/etl_ods/extract_organisation_ids.sh	Extracts Organisation IDs/ODS codes from DynamoDB into a CSV used by JMeter and injection scripts.
tests/performance/scripts/etl_ods/cloudwatch_metrics.py	Fetches ETL-ODS CloudWatch metrics and optionally exports CSV/JSON reports.
tests/performance/scripts/etl_ods/cloudwatch_config.py	Centralises ETL-ODS resource naming conventions from ENVIRONMENT/WORKSPACE.
tests/performance/scripts/etl_ods/README.md	Documents ETL-ODS load injection and metrics workflows.
tests/performance/scripts/LoadParams.groovy	Makes APIM workspace derivation configurable via a service_name JMeter property.
tests/performance/README.MD	Documents DS_Test_Plan usage and links to ETL-ODS tooling.
tests/performance/Makefile	Adds make targets for DS CRUD tests and ETL-ODS injection/metrics/extractor invocation.
tests/performance/DS_Test_Plan.jmx	New JMeter plan for dos-ingest CRUD performance testing (backend + proxy + stress modes).