Implement Vault for secret management and key rotation

[i5okie]

Inventory of Credentials

Notes added after initial assessment

Secret Name	Rotatable Keys	Type	Instances	Notes
traction-database-pguser-acapy	password	pg user credentials	crunchy postgres cluster
traction-database-pguser-pgadmin	password	pg user credentials	crunchy postgres cluster
traction-database-pguser-walletman	password	pg user credentials	crunchy postgres cluster
traction-database-pgbouncer	pgbouncer-password	pgbouncer credentials	crunchy postgres cluster
traction-database-acapy	acapy-password, walletman-password	pg user credentials	traction acapy pods
traction-database-pgbackrest	pgbackrest cert/keys		crunchy HA pods	potentially rotate the pgbackrest certs/keys
traction-database-replication-cert	ca.crt, tls.crt, tls.key	pg replication cert/key
traction-database-ha-*-certs	pgbackrest-server.crt, pgbackrest-server.key	crunchy HA pods		potentially rotate pgbackrest stuff
traction-acapy-api		acapy api keys	traction tenant ui	potentially adminApiKey, webhookapi
traction-acapy-plugin-innkeeper		acapy innkeeper key	traction acapy, tenant ui	potentially walletkey
traction-acapy-walletkey	walletKey	acapy wallet key	traction acapy

[github-actions]

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