fix: correct operator class for UUID column in ProjectTranscript unique index

[Copilot]

The initial migration (0000_initial.sql) was failing on fresh database setup because ProjectTranscript_projectId_language_key used text_ops for projectId, which is a uuid column — PostgreSQL rejects this mismatch.

Changes

• 0000_initial.sql: Change operator class for projectId from text_ops → uuid_ops in the unique index
• meta/0000_snapshot.json: Update snapshot to match corrected operator class

-- Before (broken)
CREATE UNIQUE INDEX "ProjectTranscript_projectId_language_key"
  ON "ProjectTranscript" USING btree ("projectId" text_ops, "language" text_ops);

-- After (fixed)
CREATE UNIQUE INDEX "ProjectTranscript_projectId_language_key"
  ON "ProjectTranscript" USING btree ("projectId" uuid_ops, "language" text_ops);

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