Fingerprints — Find exact and fuzzy matches

[MariusStorhaug]

Parent: #4

Delivers functions for matching file fingerprints — used to identify installed mods by their file hashes. Supports both exact and fuzzy matching, with optional game-scoping.

Acceptance criteria:

• Find-CurseForgeFingerprint matches fingerprints exactly (unscoped or by game)
• Find-CurseForgeFuzzyFingerprint matches fingerprints using fuzzy matching (unscoped or by game)
• -GameId parameter scopes the search to a specific game
• CurseForgeFingerprintMatch class models exact match results
• CurseForgeFingerprintFuzzyMatch class models fuzzy match results
• CurseForgeFingerprintMatchResult class wraps the full response (exactMatches, partialMatches, unmatchedFingerprints)
• Format files provide summary views
• Unit tests cover both match types and empty results

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Endpoints:

Function	Method	Path
Find-CurseForgeFingerprint	POST	/v1/fingerprints
Find-CurseForgeFingerprint (-GameId)	POST	/v1/fingerprints/{gameId}
Find-CurseForgeFuzzyFingerprint	POST	/v1/fingerprints/fuzzy
Find-CurseForgeFuzzyFingerprint (-GameId)	POST	/v1/fingerprints/fuzzy/{gameId}

Request bodies:

Exact: { "fingerprints": [int64, ...] }

Fuzzy: { "gameId": int32, "fingerprints": [{ "foldername": "string", "fingerprints": [int64, ...] }] }

Decision: Two functions (Find-CurseForgeFingerprint and Find-CurseForgeFuzzyFingerprint) rather than one with -Fuzzy switch, because the input shapes differ fundamentally (flat array vs folder-fingerprint objects).

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Sub-issues

See linked Tasks below.