feat: deliver v1.8.0 harness reliability and parity updates

docs/releases/1.8.0/reference-attribution.md

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+# Reference Attribution and Licensing Notes
+
+ECC v1.8.0 references research and workflow inspiration from:
+
+- `plankton`
+- `ralphinho`
+- `infinite-agentic-loop`
+- `continuous-claude`
+- public profiles: [zarazhangrui](https://github.com/zarazhangrui), [humanplane](https://github.com/humanplane)
+
+## Policy
+
+1. No direct code copying from unlicensed or incompatible sources.
+2. ECC implementations are re-authored for this repository’s architecture and licensing model.
+3. Referenced material is used for ideas, patterns, and conceptual framing only unless licensing explicitly permits reuse.
+4. Any future direct reuse requires explicit license verification and source attribution in-file and in release notes.