Add release notes for v8.15.1 release

docs/reference/release-notes.asciidoc

@@ -6,6 +6,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.15.1>>
 * <<release-notes-8.15.0>>
 * <<release-notes-8.14.3>>
 * <<release-notes-8.14.2>>
@@ -70,6 +71,7 @@ This section summarizes the changes in each release.
 
 --
 
+include::release-notes/8.15.1.asciidoc[]
 include::release-notes/8.15.0.asciidoc[]
 include::release-notes/8.14.3.asciidoc[]
 include::release-notes/8.14.2.asciidoc[]

docs/reference/release-notes/8.15.1.asciidoc

@@ -0,0 +1,69 @@
+[[release-notes-8.15.1]]
+== {es} version 8.15.1
+
+coming[8.15.1]
+
+Also see <<breaking-changes-8.15,Breaking changes in 8.15>>.
+
+[[bug-8.15.1]]
+[float]
+=== Bug fixes
+
+Aggregations::
+* Revert "Avoid bucket copies in Aggs" {es-pull}111758[#111758] (issue: {es-issue}111679[#111679])
+
+Authorization::
+* Fix DLS over Runtime Fields {es-pull}112260[#112260] (issue: {es-issue}111637[#111637])
+
+ES|QL::
+* Avoid losing error message in failure collector {es-pull}111983[#111983] (issue: {es-issue}111894[#111894])
+* Avoid wrapping rejection exception in exchange {es-pull}112178[#112178] (issue: {es-issue}112106[#112106])
+* ESQL: Fix for overzealous validation in case of invalid mapped fields {es-pull}111475[#111475] (issue: {es-issue}111452[#111452])
+
+Geo::
+* Add maximum nested depth check to WKT parser {es-pull}111843[#111843]
+* Always check `crsType` when folding spatial functions {es-pull}112090[#112090] (issue: {es-issue}112089[#112089])
+* Fix NPE when executing doc value queries over shape geometries with empty segments {es-pull}112139[#112139]
+
+Indices APIs::
+* Fix template alias parsing livelock {es-pull}112217[#112217]
+
+Infra/Core::
+* Fix windows memory locking {es-pull}111866[#111866] (issue: {es-issue}111847[#111847])
+
+Ingest Node::
+* Fixing incorrect bulk request took time {es-pull}111863[#111863] (issue: {es-issue}111854[#111854])
+* Improve performance of grok pattern cycle detection {es-pull}111947[#111947]
+
+Logs::
+* Merge multiple ignored source entires for the same field {es-pull}111994[#111994] (issue: {es-issue}111694[#111694])
+
+Machine Learning::
+* [Inference API] Move Delete inference checks to threadpool worker {es-pull}111646[#111646]
+
+Mapping::
+* Check for valid `parentDoc` before retrieving its previous {es-pull}112005[#112005] (issue: {es-issue}111990[#111990])
+* Fix calculation of parent offset for ignored source in some cases {es-pull}112046[#112046]
+* Fix synthetic source for empty nested objects {es-pull}111943[#111943] (issue: {es-issue}111811[#111811])
+* No error when `store_array_source` is used without synthetic source {es-pull}111966[#111966]
+* Prevent synthetic field loaders accessing stored fields from using stale data {es-pull}112173[#112173] (issue: {es-issue}112156[#112156])
+
+Ranking::
+* Properly handle filters on `TextSimilarityRank` retriever {es-pull}111673[#111673]
+
+Relevance::
+* Semantic reranking should fail whenever inference ID does not exist {es-pull}112038[#112038] (issue: {es-issue}111934[#111934])
+* [Bugfix] Add `accessDeclaredMembers` permission to allow search application templates to parse floats {es-pull}111285[#111285]
+
+Search::
+* Explain Function Score Query {es-pull}111807[#111807]
+
+Security::
+* Fix "unexpected field [remote_cluster]" for CCS (RCS 1.0) when using API key that references `remote_cluster` {es-pull}112226[#112226]
+* Fix connection timeout for `OpenIdConnectAuthenticator` get Userinfo {es-pull}112230[#112230]
+
+Vector Search::
+* Fix `NullPointerException` when doing knn search on empty index without dims {es-pull}111756[#111756] (issue: {es-issue}111733[#111733])
+* Speed up dense/sparse vector stats {es-pull}111729[#111729] (issue: {es-issue}111715[#111715])
+
+