Reformat LICENSE to canonical BSL-1.1 template (fix GitHub + Glama detection)

[keysersoft]

Summary

GitHub's license sidebar shows "Other" and Glama reports "Does not have a license" even though we ship a real Business Source License 1.1 file. Both use SPDX-template diff-matching (the `licensee` Ruby gem in GitHub's case). Our previous `LICENSE` file had correct legal content but missed three structural elements the matcher expects:

1. The "Notice" paragraph body explaining BSL is not OSI-approved open source.
2. The horizontal separator line between Parameters/Notice and Terms.
3. The "Covenants of Licensor" section at the end (MariaDB's required attribution back-grant).

This PR reformats `LICENSE` to the canonical template from spdx.org/licenses/BUSL-1.1 while keeping all our parameters intact (Licensor, Licensed Work, Additional Use Grant, Change Date, Change License, contact email).

No legal change. Same license, structurally aligned so automated detection works.

Expected effect after merge

• GitHub About sidebar: "Other" → "Business Source License 1.1"
• Glama Score: "Does not have a license" check passes (was: "F" license)
• License scanners and SCA tools downstream recognise the license correctly

Test plan

• Diff is whitespace + 3 added paragraphs, no parameter changes
• After merge: `gh api repos/HelpCode-ai/anythingmcp --jq .license` returns `{"key":"bsl-1.1", ...}` instead of `{"key":"other"}`
• After merge: https://glama.ai/mcp/servers/HelpCode-ai/anythingmcp/score shows license item green within 12h