Create a `transaction` table to store transactions we sent

[beeman]

We need to keep track of the transactions we sent using this wallet. This allows us to store metadata and we can use it to power other features like #323

We'll store the complete transaction so we can always parse it and show details when needed, but we'll de-normalize some fields for easy reference.

• Define final schema (needs discussion)
• Create SolanaSignatureSchema
• Create transaction entity, table, etc
• Proposed schema
  • id/createdAt/updatedAt (base fields)
  • tx / raw (store the raw transaction)
  • tx status (success or failure)
  • error? (error if failure)
  • networkType: NetworkType (so we know which network we can find this one)
  • destination: SolanaAddressSchema (so we can power Keep track of addresses we sent to #323
  • signature: SolanaSignatureSchema
  • any other fields that seem useful - but let's keep it lean
• Store sent transactions
• Consider using Tanstack DB