refactor: deconsolidate redox.patch into individual patches

The 556MB monolithic redox.patch was impossible to manage, unreviewable,
blocked GitHub pushes, and could only grow. This commit:

- Moves all 64 absorbed patches from absorbed/ to active use in base/
- Removes the absorbed/ directory (consolidation history is now PATCH-HISTORY.md)
- Removes the redox.patch symlink from recipes/core/base/
- Fixes all recipe symlinks to point to active patches (not absorbed/)
- Patches are now individually wired, reviewable, and independently rebasable

The redox.patch mega-file is no longer needed — individual patches
are applied directly from the recipe.toml patches list.

recipes/core/base/P0-daemon-fix-init-notify-unwrap.patch

@@ -1,43 +0,0 @@
-diff --git a/daemon/src/lib.rs b/daemon/src/lib.rs
-index 9f507221..c57d91dc 100644
---- a/daemon/src/lib.rs
-+++ b/daemon/src/lib.rs
-@@ -11,12 +11,23 @@ use redox_scheme::Socket;
- use redox_scheme::scheme::{SchemeAsync, SchemeSync};
- 
- unsafe fn get_fd(var: &str) -> RawFd {
--    let fd: RawFd = std::env::var(var).unwrap().parse().unwrap();
-+    let fd: RawFd = match std::env::var(var)
-+        .map_err(|e| eprintln!("daemon: env var {var} not set: {e}"))
-+        .ok()
-+        .and_then(|val| {
-+            val.parse()
-+                .map_err(|e| eprintln!("daemon: failed to parse {var} as fd: {e}"))
-+                .ok()
-+        }) {
-+        Some(fd) => fd,
-+        None => return -1,
-+    };
-     if unsafe { libc::fcntl(fd, libc::F_SETFD, libc::FD_CLOEXEC) } == -1 {
--        panic!(
-+        eprintln!(
-             "daemon: failed to set CLOEXEC flag for {var} fd: {}",
-             io::Error::last_os_error()
-         );
-+        return -1;
-     }
-     fd
- }
-@@ -51,7 +62,11 @@ impl Daemon {
- 
-     /// Notify the process that the daemon is ready to accept requests.
-     pub fn ready(mut self) {
--        self.write_pipe.write_all(&[0]).unwrap();
-+        if let Err(err) = self.write_pipe.write_all(&[0]) {
-+            if err.kind() != io::ErrorKind::BrokenPipe {
-+                eprintln!("daemon::ready write failed: {err}");
-+            }
-+        }
-     }
- 
-     /// Executes `Command` as a child process.

recipes/core/base/P0-daemon-fix-init-notify-unwrap.patch

@@ -0,0 +1 @@
+../../../local/patches/base/P0-daemon-fix-init-notify-unwrap.patch