chore(tvix/castore): move data model docs to here r/6920

These describe the castore data model, so it should live in the castore
crate.
Also, some minor edits to //tvix/store/docs/api.md, to honor the move of
the castore bits to tvix-castore.

Change-Id: I1836556b652ac0592336eac95a8d0647599f4aec
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9893
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

1 files changed, 0 insertions, 50 deletions

diff --git a/tvix/store/docs/castore.md b/tvix/store/docs/castore.md
deleted file mode 100644
index f555ba5a861b..000000000000
--- a/tvix/store/docs/castore.md
+++ /dev/null
@@ -1,50 +0,0 @@
-# //tvix/store/docs/castore.md
-
-This provides some more notes on the fields used in castore.proto.
-
-It's meant to supplement `//tvix/store/docs/api.md`.
-
-## Directory message
-`Directory` messages use the blake3 hash of their canonical protobuf
-serialization as its identifier.
-
-A `Directory` message contains three lists, `directories`, `files` and
-`symlinks`, holding `DirectoryNode`, `FileNode` and `SymlinkNode` messages
-respectively. They describe all the direct child elements that are contained in
-a directory.
-
-All three message types have a `name` field, specifying the (base)name of the
-element (which MUST not contain slashes or null bytes, and MUST not be '.' or '..').
-For reproducibility reasons, the lists MUST be sorted by that name and also
-MUST be unique across all three lists.
-
-In addition to the `name` field, the various *Node messages have the following
-fields:
-
-## DirectoryNode
-A `DirectoryNode` message represents a child directory.
-
-It has a `digest` field, which points to the identifier of another `Directory`
-message, making a `Directory` a merkle tree (or strictly speaking, a graph, as
-two elements pointing to a child directory with the same contents would point
-to the same `Directory` message.
-
-There's also a `size` field, containing the (total) number of all child
-elements in the referenced `Directory`, which helps for inode calculation.
-
-## FileNode
-A `FileNode` message represents a child (regular) file.
-
-Its `digest` field contains the blake3 hash of the file contents. It can be
-looked up in the `BlobService`.
-
-The `size` field contains the size of the blob the `digest` field refers to.
-
-The `executable` field specifies whether the file should be marked as
-executable or not.
-
-## SymlinkNode
-A `SymlinkNode` message represents a child symlink.
-
-In addition to the `name` field, the only additional field is the `target`,
-which is a string containing the target of the symlink.