release: Open Brain 1.0.2 with packaged database bootstrap

[benclawbot]

Summary

Closes #54.

This prepares Open Brain 1.0.2 and fixes the remaining standalone pip/pipx database bootstrap gap.

Database bootstrap

• adds src/db/migrations/001_base_schema.sql, so the packaged migration chain can initialize an empty PostgreSQL + pgvector database
• adds openbrain migrate for installed CLI users
• keeps initialization on the existing checksum-protected migration ledger and uses idempotent base-schema SQL
• adds regression coverage for packaged migration availability, pre-attribution upgrade ordering, and CLI success/failure behavior
• updates README and installation docs with the standalone bootstrap flow

CI reliability

• fixes e2e pytest collection so a missing API stack skips the integration suite instead of aborting ordinary pytest collection

Release 1.0.2

• bumps the Python package and Hermes plugin to 1.0.2
• updates README release metadata and CHANGELOG, including the missing 1.0.1 entry
• extends the existing Verify workflow with a release job that runs only after tests succeed on a trusted push to master
• keeps test permissions read-only and grants contents: write only to that post-verify release job
• builds and smoke-tests the release package, then creates v1.0.2 and attaches the wheel and source distribution if the release does not already exist

This supersedes #57: merely packaging schema.sql would make the file available but would not make the installed migration runner apply it.

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