Hovering over possessive form (e.g. account's) shows duplicate definition

[aromarious]

Problem

When hovering over a possessive form like account's, the definition for Account is shown twice in the hover popup.

Reproduction

1. Use the default glossary in simple_workspace (which contains a term Account)
2. Open a file containing the text account's
3. Hover over account's — the definition for Account appears twice

Why this happens

The apostrophe ' is not in Lexer.delimiters (Tokeniser.fs), so account's is treated as a single token. TokenSplitterRegex (CandidateTerms.fs) then splits it into ["account", "s"], and normalise generates window chunks: "account" (size 1) and "accounts" (size 2). Since "accounts" is singularized to "account" by Humanizer, the same term matches twice.

Possible fixes

1. Add ' to Lexer.delimiters — the tokeniser would split account's into account and s before candidate term generation. This is arguably the correct behaviour since possessive 's is not part of the word itself.
2. Add Seq.distinctBy in findMatchingTermsInIndex (Hover.fs) — deduplicate matches by term name. This is a narrower fix that doesn't change tokenisation.

I'm happy to submit a PR for either approach. What do you think?