fix(ci): resolve governance banned-language baseline failure (Refs #67) (#114)

## Summary

The `governance / Language / package anti-pattern policy` job (in
`hyperpolymath/standards`'s `governance-reusable.yml`) was failing on 8
in-tree ReScript files:

-
`panll/src/{commands/BojCmd,components/Boj,core/BojEngine,model/BojModel,modules/BojModule}.res`
(5 files — VSCode panel MVC for the BoJ clade panel)
-
`cartridges/orchestrator-lsp-mcp/panels/src/{Extension,LanguageClient,VscodeApi}.res`
(3 files — VSCode webview glue)

All 8 predate the 2026-04-30 no-new-ReScript policy and are already
tracked as migration debt under #67.

## Fix

Created `.hypatia-ignore` declaring per-file exemptions using the
canonical `cicd_rules/banned_language_file:<relpath>` form that the
upstream workflow's `is_exempt()` honours (same escape hatch as the
Hypatia static scanner — `grep -qxF "${rule}:${f}" .hypatia-ignore`).

## Not a policy widening

Each exemption line names a single specific file already on `main`. New
`.res` additions still fail the gate. Each file's removal will close one
line in `.hypatia-ignore`; the file disappears when #67 is fully
discharged.

## Test plan

- [ ] CI: `governance / Language / package anti-pattern policy` green
- [ ] CI: no regression on other `governance / *` jobs (Security,
Code-quality, Workflow-linter, Well-Known, Guix-primary)

Refs #67.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.hypatia-ignore

@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
+#
+# .hypatia-ignore — declared exemptions from hyperpolymath/standards
+# governance-reusable.yml policy rules. Format:
+#
+#   <rule>:<repo-relative-path>
+#
+# Lines starting with `#` and blank lines are ignored. The rule
+# `cicd_rules/banned_language_file` is honoured by the
+# "package anti-pattern policy" job and the Hypatia static scanner
+# (same escape hatch).
+#
+# ─── ReScript migration backlog (boj-server#67) ─────────────────────
+#
+# These 8 .res files are tracked migration debt to AffineScript.
+# They satisfy ALL three preconditions for an exemption:
+#
+#   1. Tracked: boj-server#67 ("ReScript→AffineScript migration
+#      backlog (~543 .res LOC)") is the live tracker — these files
+#      ARE that backlog.
+#   2. Pre-policy: every .res file here predates the 2026-04-30
+#      no-new-ReScript policy. None is new; all are migration
+#      candidates.
+#   3. Unblock condition documented: each file will be removed when
+#      its AffineScript equivalent lands (per #67).
+#
+# Adding new entries to this file requires user approval + a
+# tracking-issue reference.
+
+# panll VSCode panel (5 files, model/view/controller)
+cicd_rules/banned_language_file:panll/src/commands/BojCmd.res
+cicd_rules/banned_language_file:panll/src/components/Boj.res
+cicd_rules/banned_language_file:panll/src/core/BojEngine.res
+cicd_rules/banned_language_file:panll/src/model/BojModel.res
+cicd_rules/banned_language_file:panll/src/modules/BojModule.res
+
+# orchestrator-lsp-mcp cartridge panels (3 files, VSCode webview glue)
+cicd_rules/banned_language_file:cartridges/orchestrator-lsp-mcp/panels/src/Extension.res
+cicd_rules/banned_language_file:cartridges/orchestrator-lsp-mcp/panels/src/LanguageClient.res
+cicd_rules/banned_language_file:cartridges/orchestrator-lsp-mcp/panels/src/VscodeApi.res