file-issues truncates issue titles and bodies

[benthomasson]

Bug

code-expert file-issues truncates both issue titles and issue bodies when filing to GitHub.

Observed behavior:

• Titles are cut off around 110-120 characters (e.g., [autocomplete-blocklist-is-substring] The blocklist filter removes results where any blocklisted term appears as a **s)
• Body text in the "Impact" / "Gated Beliefs" section is also truncated mid-sentence (e.g., maintaining result count — but substring matching can remove far more results than the linear compensation formula anticipates gets cut to maintainin)
• All 15 issues filed in a single run exhibited this truncation

Expected behavior:

• Full belief text should appear in both title and body
• Titles should use a short summary form (not the full belief text) since GitHub titles have practical display limits

Additional issue:

• The tool fails entirely if the reasons-gate label doesn't exist on the target repo. It should create the label automatically or fall back gracefully. Error: could not add label: 'reasons-gate' not found

Reproduction:

code-expert file-issues --repo owner/repo

With a reasons.db containing 15 gated beliefs with text longer than ~120 characters.