chore(main): release 1.6.0 (#1983)

🤖 I have created a release *beep* *boop*
---


##
[1.6.0](v1.5.1...v1.6.0)
(2026-04-25)


### Features

* Add logic for handling content negotation flag with OM2
([#1986](#1986))
([0fa1ad7](0fa1ad7))
* Add OM2 native histogram text output
([#2042](#2042))
([dec8e5b](dec8e5b))
* add OTel preserve_names for scrape-time suffix handling
([#1956](#1956))
([f794288](f794288))
* compositeValues and exemplarCompliance flags for OM2 writer
([#1991](#1991))
([ff48ae8](ff48ae8))
* move suffix handling to scrape time
([#1955](#1955))
([5a5106c](5a5106c))
* OM2 writer outputs names as provided, no suffix appending
([#1957](#1957))
([5ce2b57](5ce2b57))


### Bug Fixes

* **deps:** update dependency com.google.guava:guava to v33.6.0-jre
([#2021](#2021))
([1382693](1382693))
* **deps:** update dependency commons-io:commons-io to v2.22.0
([#2044](#2044))
([9e05c1d](9e05c1d))
* **deps:** update dependency
io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
to v2.27.0-alpha
([#2022](#2022))
([30ac534](30ac534))
* **deps:** update dependency
io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
to v2.27.0-alpha
([#2023](#2023))
([2d51a32](2d51a32))
* **deps:** update dependency io.prometheus:prometheus-metrics-bom to
v1.5.1 ([#2004](#2004))
([650ce4b](650ce4b))
* **deps:** update dependency org.apache.tomcat.embed:tomcat-embed-core
to v11.0.21
([#2005](#2005))
([7a36df7](7a36df7))
* **deps:** update dependency
org.springframework.boot:spring-boot-starter-parent to v4.0.5
([#2006](#2006))
([0106c18](0106c18))
* **deps:** update dependency
org.springframework.boot:spring-boot-starter-parent to v4.0.6
([#2046](#2046))
([40a9db8](40a9db8))
* **deps:** update jetty monorepo to v12.1.8
([#2007](#2007))
([acab5b2](acab5b2))
* **deps:** update protobuf
([#2024](#2024))
([8e2214e](8e2214e))
* pass release tag as input to deploy workflow
([#1982](#1982))
([165c921](165c921))
* pin grafana/otel-lgtm to 0.7.2 in OATs acceptance test
([#1992](#1992))
([f17ad9a](f17ad9a))
* Relax metric name validation in Dropwizard5
([#1985](#1985))
([deb782f](deb782f))
* stabilize flaky timer and thread count tests
([#1973](#1973))
([ce5867b](ce5867b))
* Tighten OM2 summary and start timestamp output
([#2041](#2041))
([5699469](5699469))
* trigger Maven deploy from release-please via workflow_dispatch
([#1981](#1981))
([698f956](698f956))

---
> [!IMPORTANT]
> Close and reopen this PR to trigger CI checks.

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.github/config/.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "1.5.1"
+  ".": "1.6.0"
 }

CHANGELOG.md

@@ -5,7 +5,7 @@
   <parent>
     <groupId>io.prometheus</groupId>
     <artifactId>client_java</artifactId>
-    <version>1.5.2-SNAPSHOT</version>
+    <version>1.6.0</version>
   </parent>
 
   <artifactId>benchmarks</artifactId>

benchmarks/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-custom-buckets</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>8</maven.compiler.release>

examples/example-custom-buckets/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-greeting-service</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>17</maven.compiler.release>

examples/example-exemplars-tail-sampling/example-greeting-service/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-hello-world-app</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>17</maven.compiler.release>

examples/example-exemplars-tail-sampling/example-hello-world-app/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-exemplars-tail-sampling</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
   <packaging>pom</packaging>
 
   <name>Example - Exemplars with OpenTelemetry's Tail Sampling</name>

examples/example-exemplars-tail-sampling/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-exporter-httpserver</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>8</maven.compiler.release>

examples/example-exporter-httpserver/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-exporter-multi-target</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>8</maven.compiler.release>

examples/example-exporter-multi-target/pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>io.prometheus</groupId>
   <artifactId>example-exporter-opentelemetry</artifactId>
-  <version>1.5.2-SNAPSHOT</version>
+  <version>1.6.0</version>
 
   <properties>
     <maven.compiler.release>8</maven.compiler.release>