docs(release): Update release process documentation and bump version …

[justindobbs]

…to 1.1.2

• Update release workflow paths from docs/core.md to docs/specs/core.md and docs/release_process.md to docs/operations/release_process.md
• Add tracecore tasks validate --registry step to bundle + artifact checks in release workflow
• Update CI reference from tests.yml to ci.yml in release workflow
• Update project positioning path from docs/project_positioning.md to docs/reference/project_positioning.md
• Bump version from 1.1.

Summary

• What problem does this PR solve?
• How does it solve it (major bullets)?

Testing

• python -m pytest
• python -m ruff check agent_bench
• Additional targeted tests (list):

Checklist

• Spec/docs updated (README, SPEC_FREEZE, changelog, etc., as needed)
• New tasks/tests added to registry + SPEC if applicable
• Roadmap items tracked in appropriate boards (if applicable)
• Security/privacy review (if touching telemetry, signing, or bundles)
• Verified CI status once pushed