[PFX-350]: Upgrade to Fastify v4

[bbetts-godaddy]

Summary

• Ticket: PFX-350

This PR includes updates to the BYO logger to be compatible with the pino logger used by Fastify.

Changelog

• Upgrade to Fastify v4

Test Plan

• Creating an app with the fastify plugin locally builds and runs as expected.

Tests Passing

[github-actions]

package-lock.json changes

Summary

Status	Count
	6
	17
	8

Click to toggle table visibility

Name	Status	Previous	Current
@fastify/accept-negotiator		-	1.1.0
@fastify/ajv-compiler		1.1.0	3.5.0
@fastify/deepmerge		1.3.0	-
@fastify/error		2.0.0	3.4.1
@fastify/middie		-	8.3.0
@fastify/send		-	2.1.0
@fastify/static		5.0.2	7.0.2
@fastify/swagger-ui		-	3.0.0
@fastify/swagger		6.1.0	8.14.0
@lukeed/ms		-	2.0.2
avvio		7.2.5	8.3.0
encoding-negotiator		2.0.1	-
fast-json-stringify		2.7.13	5.13.0
fastify-plugin		3.0.1	-
fastify		3.29.5	4.26.2
find-my-way		4.5.1	8.1.0
flatstr		1.0.12	-
json-schema-resolver		1.3.0	2.0.0
light-my-request		4.9.0	5.12.0
middie		5.4.0	-
openapi-types		10.0.0	12.1.3
path-scurry		1.10.1	1.10.2
pino-std-serializers		3.2.0	6.2.2
pino		6.14.0	8.19.0
process-warning		1.0.0	3.0.0
ret		-	0.2.2
semver-store		0.3.0	-
set-cookie-parser		2.4.8	2.6.0
sonic-boom		1.4.1	3.8.0
string-similarity		4.0.4	-
tiny-lru		8.0.2	-

[agerard-godaddy]

You will want to fallback to the logger's methods, not the console's.

debug, error, info, and warn are guaranteed (verify code) to be on the logger.

const fallbackMap = {
  fatal: 'error',
  trace: 'debug'
}

Suggested change

	fastifyLogger[level] = logLevels[level];
	fastifyLogger[level] = logger[fallbackMap[level]];

[bbetts-godaddy]

Sounds good! Just made that update.