Mostly I agree with the advice we give here.
But I am putting my professional hat here.

Most people benefit from journalling.Making a life book or scrap book.
For some the trauma is deep and held in a place no one should tamper with.
That is why only a sensitive trained person working with elderly will go into the yesteryear.
There are boxes of memeory things taken into residential care..so the folks can unwind share and so settle into their new life style.
For some this unlocks prior wounds.Even the smell of a sweet connected to hurt or a piece of music can do more harm than good. Only after careful listening should any practionioner procede.
You said

This post was totally unplanned and was more stream-of-consciousness writing than I have probably ever done about my past

so I sense you are in control of your own strategy for living. This does mean though that you may return to this again.And then will be the time to share again.

Maybe next anniversary..maybe never again.
What really matters is that you know we care and share.
Mountaina ash