[AUTO] Add release notes for 3.6.0

[opensearch-ci-bot]

Add release notes for 3.6.0

Borderline Calls

• Change the final output result of struct from list to map #5227: Placed in Features — could also be Enhancements since it changes the output format of an existing command (graphlookup). Chose Features because it introduces a new output representation (map vs list) that changes the data contract.
• [BugFix]Fix multisearch UDT type loss through UNION (#5145, #5146, #5147) #5154: Placed in Features — could also be Bug Fixes since it fixes type loss through UNION. Chose Features because the label includes "feature" and "bugFix", and the change introduces new override behavior in the type factory.
• Bump ANTLR Version to 4.13.2 #5159: Placed in Enhancements — could also be Infrastructure or Maintenance. Chose Enhancements because the ANTLR upgrade enables new grammar capabilities (ATN serialization v4) needed for the grammar bundle API.
• Make sql plugin aware of FIPS build param (-Pcrypto.standard=FIPS-140-3) #5155: Placed in Enhancements — could also be Infrastructure or Maintenance. Chose Enhancements because the label includes "enhancement" and it adds new build-time capability for FIPS compliance.
• Add gradle.properties file to build sql with -Pcrypto.standard=FIPS=140-3 by default #5231: Placed in Infrastructure — labels include both "infrastructure" and "maintenance". Chose Infrastructure because it modifies the build configuration.
• [Maintenance] Fix bc-fips jar hell by marking dependency as compileOnly #5158: Placed in Maintenance — could also be Bug Fixes since it fixes a jar hell issue. Chose Maintenance because the label is "maintenance" and it's a dependency management change.
• Revert dynamic column support #5139: Placed in Maintenance — could also be Refactoring. Chose Maintenance because the label is "maintenance" and it's a revert in preparation for a redesign.
• Fix pitest dependency resolution with stable runtime version #5143: Placed in Bug Fixes — could also be Infrastructure. Chose Bug Fixes because the labels include "bugFix" and it fixes a broken build dependency.
• added cloudwatch style contains operator #5219: Placed in Enhancements — could also be Features. Chose Enhancements because the label is "enhancement" and contains is syntactic sugar over existing LIKE functionality.
• Support creating/updating prometheus rules #5228: Placed in Enhancements — could also be Features. Chose Enhancements because the label is "enhancement", though it adds new API endpoints. The Prometheus rules support extends existing direct query resources framework.
• Implement reverse performance optimization #4775: Placed in Enhancements — could also be Bug Fixes since it resolves issues with large datasets. Chose Enhancements because the label is "enhancement" and the primary change is a performance optimization.

[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit 314b81f)

Here are some key observations to aid the review process:

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ Recommended focus areas for review Duplicate Entry PR #5155 appears twice in the release notes — once under "Features" (line 31, FIPS build parameter) and once under "Infrastructure" (line 50, gradle.properties for FIPS). These may describe the same or closely related changes and should be verified to avoid duplication or clarified if they are truly distinct PRs. * Make SQL plugin aware of FIPS build parameter for proper BouncyCastle dependency scoping ([#5155](https://github.com/opensearch-project/sql/pull/5155)) ### Bug Fixes * Preserve head/TopK semantics for sort-expression pushdown to prevent returning more rows than requested ([#5135](https://github.com/opensearch-project/sql/pull/5135)) * Return null instead of error for double overflow to Infinity in arithmetic operations ([#5202](https://github.com/opensearch-project/sql/pull/5202)) * Return actual null from `JSON_EXTRACT` for missing or null paths instead of the string "null" ([#5196](https://github.com/opensearch-project/sql/pull/5196)) * Fix MAP path resolution for `top/rare`, `join`, `lookup`, and `streamstats` commands ([#5206](https://github.com/opensearch-project/sql/pull/5206)) * Fix MAP path resolution for symbol-based PPL commands by pre-materializing dotted paths ([#5198](https://github.com/opensearch-project/sql/pull/5198)) * Fix PIT (Point in Time) resource leaks in v2 query engine for explain, early close, and cursor close scenarios ([#5221](https://github.com/opensearch-project/sql/pull/5221)) * Fix fallback error handling to show original Calcite error instead of V2's generic message ([#5133](https://github.com/opensearch-project/sql/pull/5133)) * Fix memory leak caused by `ExecutionEngine` recreated per query appending to global function registry ([#5222](https://github.com/opensearch-project/sql/pull/5222)) * Fix path navigation on map columns for `spath` command by removing unconditional alias wrapping ([#5149](https://github.com/opensearch-project/sql/pull/5149)) * Fix pitest dependency resolution by decoupling plugin version from runtime version ([#5143](https://github.com/opensearch-project/sql/pull/5143)) * Fix typo: rename `renameClasue` to `renameClause` in ANTLR grammar files ([#5252](https://github.com/opensearch-project/sql/pull/5252)) * Fix `isnotnull()` not being pushed down when combined with multiple `!=` conditions ([#5238](https://github.com/opensearch-project/sql/pull/5238)) ### Infrastructure * Add `gradle.properties` file to build SQL with FIPS-140-3 crypto standard by default ([#5231](https://github.com/opensearch-project/sql/pull/5231)) Categorization Concern PR #5154 is listed under "Features" with a description starting with "Fix multisearch UDT type loss", which reads more like a bug fix. The PR description acknowledges this borderline call, but reviewers should confirm the categorization aligns with project conventions, especially since the entry text itself uses "Fix" language. * Fix multisearch UDT type loss through UNION by preserving UDT types in `leastRestrictive()` ([#5154](https://github.com/opensearch-project/sql/pull/5154))

[github-actions]

Persistent review updated to latest commit 314b81f

[opensearch-trigger-bot]

The backport to main failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/sql/backport-main main
# Navigate to the new working tree
pushd ../.worktrees/sql/backport-main
# Create a new branch
git switch --create backport/backport-5309-to-main
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 49b3bc5ebdb906a1343befadaca76cb95c67ff34
# Push it to GitHub
git push --set-upstream origin backport/backport-5309-to-main
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/sql/backport-main

Then, create a pull request where the base branch is main and the compare/head branch is backport/backport-5309-to-main.