license: relicense source headers to GPL-3.0-or-later

[jamesarich]

Summary

Relicenses kzstd's source headers from GPL-3.0-only to GPL-3.0-or-later, aligning with the Meshtastic org standard. The other first-party repos (and meshtastic-sdk's ADR-004) use -or-later, which is also what the flagship repos' stock FSF GPLv3 notice implies; kzstd was the outlier at -only.

What changed

• SPDX-License-Identifier: GPL-3.0-only → GPL-3.0-or-later in 31 files (all src/** Kotlin, build.gradle.kts, settings.gradle.kts, scripts/train_test_dict.py).
• Two doc references updated to match (AGENTS.md, CONTRIBUTING.md).
• The LICENSE file (stock GPLv3 text, identical for -only/-or-later) is unchanged.

Note

-only → -or-later broadens the license grant. As the copyright holder, Meshtastic is entitled to make this change; it's an intentional standardization, not a narrowing. Requested by the repo owner as part of the org KMP standard-alignment effort.

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Configuration used: Organization UI

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Run ID: 4994887e-cf28-4b70-ae34-269e9a85ddcd

📥 Commits

Reviewing files that changed from the base of the PR and between ec388b7 and 3b5dbec.

📒 Files selected for processing (32)

• AGENTS.md
• CHANGELOG.md
• CONTRIBUTING.md
• build.gradle.kts
• scripts/train_test_dict.py
• settings.gradle.kts
• src/commonMain/kotlin/org/meshtastic/kzstd/Zstd.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/ZstdDictionary.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/ZstdException.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/BitReader.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/BitWriter.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/Fse.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/FseEncoder.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/Huffman.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/MatchIndex.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/OutputBuffer.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/ParsedDictionary.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/SequenceTables.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/ZstdDecoder.kt
• src/commonMain/kotlin/org/meshtastic/kzstd/internal/ZstdEncoder.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/DictEntropyDecodeTest.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/DictEntropyGuardTest.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/EncoderBlockLimitTest.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/MaxSizeGuardTest.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/TestVectors.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/ZstdDecoderMalformedTest.kt
• src/commonTest/kotlin/org/meshtastic/kzstd/ZstdRoundTripTest.kt
• src/jvmTest/kotlin/org/meshtastic/kzstd/ByteIdenticalRegressionTest.kt
• src/jvmTest/kotlin/org/meshtastic/kzstd/ConcurrencyTest.kt
• src/jvmTest/kotlin/org/meshtastic/kzstd/KzstdLibzstdInteropTest.kt
• src/nativeTest/kotlin/org/meshtastic/kzstd/NativeConcurrencyTest.kt
• src/wasmWasiTest/kotlin/org/meshtastic/kzstd/WasmWasiCodecTest.kt

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