Looking at your list of requirements and specifications, the S&W Model 41 and Ruger MK II and MK III both fit. Most of your variations in specifications are a matter of personal preference.
I am looking for a .22LR semi-auto pistol to be used for the following activities:
1. Hunting
2. Plinking
3. Informal target shooting
4. Informal personal defense
5. To take it everywhere (hunting, fishing, business travel, camping, survival trips, etc.)
Pistol specifications that need to be met:
1. Barrel length: Best fit for the above activities. Barrel length is a matter of personal preference. I really like the light 5” barrel on my 41, but I also like the 5 ½” barrel on the MK III Bull Barrel and the fluted 6 7/8” barrel on the MK III Hunter. You have to pick the barrel length that best suits you.
2. Action: Semi-automatic. Yes
3. Caliber: .22LR. Yes
4. Sights: Good open sights as well as drilled and tapped for optical/red dot scopes. Yes. My 41 has terrific iron sights. The Rugers have good sights, but I prefer the Vulquartsen rear sight for the Ruger and a plain black, serrated blade on my Hunter. Another case of personal preference.
5. Finish: Blue or stainless. I prefer stainless. You may not.
6. Grips: Wood, plastic, exchange ables. Good feel type. The grips on the 41 are excellent. I have replaced the grips on the MK IIIs with slightly thicker checkered wood grips. More personal preference.
7. Firing pin: To be capable of NOT making marring marks if accidentally trigger is pulled in an empty chamber. Yes.
8. Accuracy: To be able to print easily 1 to 2" groups at 25 yards open sights and the same at 50 yards w/scope. I believe so, but the Rugers do require some breaking in to achieve optimum accuracy. I break mine in by shooting a few hundred rounds of high speed, copper washed ammo to help smooth the barrel.
9. Quality: To use it for a long time and hopefully a couple more generations down the line. The 41 is to my mind a more delicate gun. The Rugers are anvils. Both are well made.
10. Price: Under $1000. Rugers certainly are. 41 can be found used for that price range, but probably not new.
Do we have anything like that available off the shelf? Probably not. You can expect to have to modify what ever you get to dial it in for your personal preferences. I shortened the barrel of my 41 to get it the way I want it. On the MK III Hunter I changed the grips, put in a VQ MK II hammer and sear, a Marvel trigger, a VQ rear sight and a standard Ruger front sight. I suspect you can get pretty close to what you want, but then must make a list of anticipated mods and see which gun, of all those you consider, is closest or easiest to make into your ideal.
If not what will need to be done to get there? Dial it in for your personal preferences.