Prepare release 0.31.0

Add changelog for 0.31.0 and bump VERSION.

Signed-off-by: Sebastian Schubert <basti@schubert.digital>

Author: bastischubert

CHANGELOG.md

@@ -1,3 +1,47 @@
+## 0.31.0 / 2026-06-30
+
+BREAKING CHANGES:
+
+Regenerating snmp.yml with the generator now maps enum lookup columns to
+human-readable string labels (e.g. `"ioMemory"` instead of `"2"`) by default.
+Dashboards, alerts, or recording rules that match on numeric enum label values
+may need updating. Opt out per metric/lookup with `type: gauge`.
+
+* [FEATURE] Add DISPLAY-HINT support for SNMP OctetString formatting #1549
+* [CHANGE] Map enum lookup columns to human-readable string labels #1624
+* [CHANGE] generator: Handle net-snmp 5.9.5.x changes to struct tclist #1550
+* [CHANGE] generator: Update Docker base image to Debian Trixie #1635
+* [ENHANCEMENT] Apply scale and offset during applyRegexExtracts #1580
+* [ENHANCEMENT] Docker: Added consistent opencontainer image labels #1581
+* [ENHANCEMENT] generator: Move generator output to repo root snmp.yml #1557
+* [ENHANCEMENT] docs(generator): Document default EnumAsInfo enum label behavior #1634
+* [ENHANCEMENT] Update docs on where to get APC MIBs #1600
+* [ENHANCEMENT] Add git and patch to RHEL installation command #1609
+* [BUGFIX] Ensure memory isolation for WalkParams.Retries per module #1598
+* [BUGFIX] Fix multiple dynamic filters on the same OID overriding each other #1625
+* [BUGFIX] Fix IPv6 bracket handling in target parsing #1588
+* [BUGFIX] Treat empty environment variables as set during expansion #1626
+* [BUGFIX] Also error when env var in config is prefixed or suffixed #1500
+* [BUGFIX] Reject empty module query parameter #1629
+* [BUGFIX] Handle hex.DecodeString error for SNMPv3 EngineID #1591
+* [BUGFIX] Use comma-ok type assertion and length guard in parseNtpTimestamp #1590
+* [BUGFIX] generator: Close output file to prevent fd leak #1592
+* [BUGFIX] generator: Fix Synology MIB file download link #1615
+* [BUGFIX] generator: Fix generator publish #1608
+* [BUGFIX] generator: Fetch Eltex MIBs from prometheus-community/snmp #1628
+
+snmp.yml changes:
+* Add branchTable to servertech_sentry3 module #1554
+* Update Sentry3-MIB #1555
+* Improve Sentry4-MIB module #1560
+* Update Eltex MIBs #1564 #1573 #1628
+* Add DELL-RAC-MIB #1566
+* Patch SYNOLOGY-SMART-MIB #1574
+* Update Mikrotik MIBs #1582
+* Add Synology diskID, diskName, diskRole overrides #1603
+* Regenerate snmp.yml with enum lookup string labels #1624
+
+
 ## 0.30.1 / 2026-01-06
 
 * [BUGFIX] Fix gosnmp import #1547

VERSION

@@ -1 +1 @@
-0.30.1
+0.31.0