feat: publish Gamertan Web Foundations preview source

Export the reviewed application-neutral package set through the exact public allowlist. Development history and private application evidence remain outside this canonical source root.

Developed with material AI assistance under maintainer review.

Signed-off-by: Cole Speelman <crspeelman@gmail.com>

docs/ADOPTION.md

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+<!-- SPDX-License-Identifier: MPL-2.0 -->
+
+# Application adoption contract
+
+The foundation is designed and tested as independent software before an
+existing application migrates to it. No application's historical schema,
+roles, route names, analytics categories, or operator workflow belongs in a
+general package merely because it makes one migration easier.
+
+An application adopts one boundary at a time:
+
+1. implement a narrow adapter at the application edge;
+2. run the old and new decisions against the same reviewed fixtures;
+3. explain intentional differences;
+4. deploy without deleting the retained implementation;
+5. observe a defined production soak; and
+6. remove old code only after rollback and data-compatibility evidence passes.
+
+EQL Helper is intended to be the first demanding adopter, not the design
+template. Its private evidence, persistent bans, account data, route policy,
+operator exclusions, synchronization, and publishing workflow remain
+application-owned. Useful pressure from that migration may improve a general
+interface, but it may not smuggle EQL-specific policy into this module.