Prepare v1.3.0 release (#7467)

Signed-off-by: Johan Fylling <[email protected]>

Author: johanfylling

CHANGELOG.md

@@ -3,7 +3,62 @@
 All notable changes to this project will be documented in this file. This
 project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## 1.3.0
+
+This release contains a mix of features, bugfixes, and dependency updates.
+
+### New Buffer Option for Decision Logs ([#5724](https://github.com/open-policy-agent/opa/issues/5724))
+
+A new, optional, buffering mechanism has been added to decision logging. 
+The default buffer is designed around making precise memory footprint guarantees, which can produce lock contention at high loads, negatively impacting query performance.
+The new event-based buffer is designed to reduce lock contention and improve performance at high loads, but sacrifices the memory footprint guarantees of the default buffer.
+
+The new event-based buffer is enabled by setting the `decision_logs.reporting.buffer_type` [configuration option](https://www.openpolicyagent.org/docs/latest/configuration/#decision-logs) to `event`.
+
+For more details, see the decision log plugin [README](https://github.com/open-policy-agent/opa/blob/main/v1/plugins/logs/README.md).
+
+Reported by @mjungsbluth, authored by @sspaink
+
+### OpenTelemetry: HTTP Support and Expanded Batch Span Configuration ([#7412](https://github.com/open-policy-agent/opa/issues/7412))
+
+Distributed tracing through OpenTelemetry has been extended to support HTTP collectors (enabled by setting the `distributed_tracing.type` configuration option to `http`).
+Additionally, configuration has been expanded with fine-grained batch span processor [options](https://www.openpolicyagent.org/docs/latest/configuration/#distributed-tracing).
+
+Authored and reported by @sqyang94
+
+### Runtime, Tooling, SDK
+
+- compile: Require multi-term entrypoint paths for optimized bundle building ([#7321](https://github.com/open-policy-agent/opa/issues/7321)) authored by @johanfylling reported by @nikpivkin
+- fmt: Allow one liner rule grouping ([#6760](https://github.com/open-policy-agent/opa/issues/6760)) authored by @anderseknert
+- fmt: Fix v0-compatible fmt with stdin ([#7409](https://github.com/open-policy-agent/opa/issues/7409)) authored and reported by @charlieegan3
+- ir: Fix nil pointer deref in Unmarshal() when handling IsSetStmt ([#7415](https://github.com/open-policy-agent/opa/issues/7415)) authored and reported by @KrisKennawayDD
+- planner: Fix Wasm vs non-Wasm evaluation difference bug related to the overeager optimization of ref head rules ([#7439](https://github.com/open-policy-agent/opa/pull/7439)) authored by @srenatus
+- sdk: Removing repeat args from sub-func call ([#7443](https://github.com/open-policy-agent/opa/pull/7443)) authored by @alingse
+- tester: Including parameterized test cases in test report counter ([#7407](https://github.com/open-policy-agent/opa/issues/7407)) authored by @johanfylling
+- tester: Only including failed sub-test cases in report summary when non-verbose ([#7426](https://github.com/open-policy-agent/opa/pull/7426)) authored by @johanfylling
+
+### Docs, Website, Ecosystem
+
+- docs: Add some notes about AI assisted patches ([#7436](https://github.com/open-policy-agent/opa/pull/7436)) authored by @charlieegan3
+- docs: Add query_parameters_to_set ([#7405](https://github.com/open-policy-agent/opa/pull/7405)) authored by @sedovmik
+- docs: Delete reference to license key in Envoy tutorial ([#7466](https://github.com/open-policy-agent/opa/pull/7466)) authored by @joostholslag
+- docs: Fix typo in Envoy tutorial ([#7464](https://github.com/open-policy-agent/opa/pull/7464)) authored by @joostholslag
+- docs: Update slack inviter link ([#7450](https://github.com/open-policy-agent/opa/pull/7450)) authored by @charlieegan3
+- docs: Update terraform examples ([#7429](https://github.com/open-policy-agent/opa/pull/7429)) authored by @charlieegan3
+- docs: Simplify `kind` usage instruction in Envoy tutorial ([#7465](https://github.com/open-policy-agent/opa/pull/7465)) authored by @joostholslag
+
+### Miscellaneous
+
+- Enable unused-receiver linter (revive) ([#7448](https://github.com/open-policy-agent/opa/pull/7448)) authored by @anderseknert
+- Dependency updates; notably:
+  - build(deps): bump github.com/containerd/containerd from 1.7.26 to 1.7.27
+  - build(deps): bump github.com/dgraph-io/badger/v4 from 4.5.1 to 4.6.0
+  - build(deps): bump github.com/opencontainers/image-spec from 1.1.0 to 1.1.1
+  - build(deps): bump github.com/prometheus/client_golang 1.21.0 to 1.21.1
+  - build(deps): bump golang.org/x/net from 0.35.0 to 0.37.0
+  - build(deps): bump golang.org/x/time from 0.10.0 to 0.11.0
+  - build(deps): bump google.golang.org/grpc from 1.70.0 to 1.71.0
+  - build(deps): bump go.opentelemetry.io deps to 1.35.0/0.60.0
 
 ## 1.2.0