doc: update TODOs, general housekeeping

doc/TODO.txt

@@ -1,13 +1,6 @@
 TODO: soft-deletion
-- enable soft-deletion if table has `is_deleted` and `deleted_at` fields
-- if soft delete is enabled, DeleteXyz should do update (not delete) and set is_deleted and deleted_at
-    - ...and DeleteXyz should have pointer receiver for soft-delete
 - GetXyzByID should include `ErrItemIsDeleted` if item is soft-deleted
 
-TODO: migration-structs
-- Right now, migrations are strings.  Could be a struct with "name", "up" and "down" fields
-- Adding a "down" operation enables handling newer DB versions with "down instead of error-out" for development (perhaps a flag)
-
 IDEA: migrations-table
 - Store migrations in a table.  This makes the schema more self-documenting.
 - Possible schema: name, sql_up, sql_down, hash (computed from those fields plus previous migration hash)
@@ -27,9 +20,21 @@ TODO: generated test file inclues global test DB setup, which is wrong
 TODO: join-tables
 - handle codegen for without rowid tables properly
 - add "get all X for Y"
-
-TODO: create a Getter function for each unique index
+- Example: `chat_pinned_messages`
 
 TODO: consider CreateDB and CreateMemoryDB
 
 TODO: generate tests for the remaining CRUD, try to hit ~100% default test coverage
+
+TODO: test reporter
+- coverage: https://x.com/wispem_wantex/status/2009799380648505563
+    - Jest shows for each file: % of lines, functions, branches and statements covered
+    - Go reporter should show:
+        - group coverage stats by either function, file or package
+        - count by statements, branches or functions
+        - Show both raw count and percentage
+        - list which lines / branches / functions were missed
+        - pretty (terminal) format or JSON format
+
+TODO: foreign key to compound-FK table
+    - sample: booru_post_tag_votes

doc/gas-stack.md

@@ -29,6 +29,12 @@
 
 - `ops` directory
 
+### Reinventing the wheel
+
+Wheels aren't difficult to invent; the concept is very simple.  However, there's many different types, shapes and sizes of wheels.  The wheel on a shopping cart is different from the wheel on a bicycle, a car, a tractor, a train, a spool of thread, etc.
+
+Reinventing the wheel is good.  It's good to use things that are specifically built for your purpose, with exactly the set of features and affordances you need.  Using a wheel that was made by someone else for a different purpose can be faster at first, but it's likely that their needs were different from yours.
+
 ### Borrowed from Ruby On Rails
 
 - Convention Over Configuration