Use the GameMaker LTS 2026 manual for generated evidence links

[Infiland]

Follow-up to #575 and PR #614.

Problem

GM2Godot targets GameMaker LTS 2026, but its generated compatibility evidence still builds documentation links from the mutable https://manual.gamemaker.io/monthly/en/ root.

The stale root appears in the GML API manifest, manual-scope index, and function-dispatch fallback. Existing tests currently enforce the monthly URL. A monthly manual update can therefore make generated evidence describe APIs or semantics outside GM2Godot's declared LTS baseline.

Use the official GameMaker LTS manual root:

https://manual.gamemaker.io/lts/en/

This is an evidence-link correction only; it must not change support statuses, lowering, or runtime behavior.

Acceptance criteria

• One canonical GameMaker LTS manual root is reused by the API manifest, manual-scope index, and function-dispatch fallback.
• Every GMLAPIEntry, GMLManualScopeEntry, GMLFunctionDescriptor, and runtime API-index documentation URL uses https://manual.gamemaker.io/lts/en/.
• Rendered gml_manual_scope.md contains LTS links and no /monthly/en/ links.
• Tests enumerate the generated evidence entries and fail if a monthly URL returns.
• The default descriptor fallback is covered explicitly.
• Existing support classifications and generated runtime behavior remain unchanged.
• Pyright and the focused manifest, manual-scope, runtime-index, and CLI report tests pass.

Repository research anchors or historical issue text that intentionally discusses monthly releases are outside this issue unless they feed generated evidence.

[Infiland]

Campaign reconciliation (2026-09-04): exact Godot 4.7.2 baseline #868/#869 and v0.7.69 are complete. This issue remains the sole owner and must land before #861; afterward only #861 delta commit e9d1537 should be retained on the new main.

Standalone completion also includes the 0.7.70 release surfaces, Pyright, Ruff, full unittest, exact Godot 4.7.2 gates, pinned SNAP/Adding LTS gates, independent review, complete PR CI, merge, verified v0.7.70 assets/checksums, and immediate worktree/branch cleanup.

Non-goals remain: support-classification, lowering, generated-runtime/output, or diagnostic-semantic changes; top-level facade/language-metadata/lexical refactors; GameMaker fixture revisions; Godot target changes; live Wiki publication; and historical/research-anchor rewrites.

[Infiland]

Acceptance evidence:

• PR Use the GameMaker LTS 2026 manual for generated evidence links #870 merged with merge commit 4e8d0aff164cae3e76851a7732d7416744d8e8d3.
• v0.7.70 is published from that exact commit: https://github.com/Infiland/GM2Godot/releases/tag/v0.7.70
• Release workflow 33828519537 completed successfully: https://github.com/Infiland/GM2Godot/actions/runs/33828519537
• All 1,186 API entries, 1,089 function descriptors, 39 manual-scope entries, and 1,186 runtime-index entries use the canonical GameMaker LTS manual root. The 233 generated topics are members of the pinned 3,311-topic official YoYo Games tree at commit bb7dc2165b6bd77eedfe4dd5afe3445ef53a4601.
• Sanitized non-documentation metadata is byte-identical to the pre-change baseline (7d6981d7…), and the embedded runtime remains 684,374 bytes / ed3a4ab2….
• Local gates passed: Pyright zero diagnostics, Ruff, 2,854 repository tests (78 expected skips), 83 exact Godot 4.7.2 discovery tests, 66 additional Godot tests, and all 3 pinned LTS fixture-required tests. Independent review found no blockers.
• Hosted PR gates passed: 17 successful, 4 intentionally skipped, 0 failed/pending.
• Independently downloaded all 250,694,427 release payload bytes. Every local digest matched the GitHub API and the four-line SHA256SUMS manifest:
  • Linux ZIP: 2901e93762a9b80fd611a138fbf241bbc4b394b7cd25acc15432c69ba6e94428
  • macOS DMG: a493e3b4eed6142480d7a8453538e4065685031069bef7ef570b8a5abdabf790
  • macOS ZIP: c4f8374cda2a7770990ecbe1251d21d8b244569cb27213a655aaa7d7a107ec3f
  • Windows ZIP: 00daf4f5d78cde35f4464a547e897c5ddb0fd9012653e55fca7e580218604565
  • SHA256SUMS: 216dc7d93d30cf3ffcb498500f4a98fc35940610f3e9eac06764fc0df9eb3f9c

This slice changed only evidence URLs and the three documented compatibility-note explanations; support/lowering/diagnostic behavior, generated GDScript/resources, runtime bytes, and public APIs remain unchanged.