Add public domain license and headers to all source files

- Add LICENSE file (public domain, permacomputer values)
- Add license headers to all 27 Python source files
- Restore full about_ch9_p2 with "terminated 🟣" content
- Translate about_ch9_p2 to all 26 languages

The permacomputer is community-owned infrastructure optimized around:
TRUTH, FREEDOM, HARMONY, LOVE

serp/models.py

@@ -1,3 +1,26 @@
+# PUBLIC DOMAIN - NO LICENSE, NO WARRANTY
+#
+# This is free public domain software for the public good of a permacomputer hosted
+# at permacomputer.com - an always-on computer by the people, for the people. One
+# which is durable, easy to repair, and distributed like tap water for machine
+# learning intelligence.
+#
+# The permacomputer is community-owned infrastructure optimized around four values:
+#
+#   TRUTH    - First principles, math & science, open source code freely distributed
+#   FREEDOM  - Voluntary partnerships, freedom from tyranny & corporate control
+#   HARMONY  - Minimal waste, self-renewing systems with diverse thriving connections
+#   LOVE     - Be yourself without hurting others, cooperation through natural law
+#
+# Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+# software, either in source code form or as a compiled binary, for any purpose,
+# commercial or non-commercial, and by any means.
+#
+# NO WARRANTY. THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.
+#
+# Copyright 2025 TimeHexOn & foxhop & russell@unturf
+# https://git.unturf.com/engineering/unturf/pig.py
+
 """Pydantic models for SERP API.
 
 # Side quest 1/21: no ticket to now.