feat(transport): TUS upload for large attachments

[jpnurmi]

• Large attachments (>=100 MB) are stored as attachment-ref envelope items
• Database layer stores large attachment files separately as db/cache/<uuid>-*
• Transport layer streams each attachment-ref to the server via TUS before sending the envelope
• Lays out the foundations with support for inproc and breakpad - native with daemon/IPC-related extra hoops comes separately in feat(native): TUS upload for large attachments #1684

Examples:

• Large user attachment (inproc, macOS):
  
  https://sentry-sdks.sentry.io/issues/7447018402/?environment=playground&project=4506178389999616

• Inflated minidump (breakpad, Windows):
  
  https://sentry-sdks.sentry.io/issues/7447288704/?environment=playground&project=4506178389999616

See also:

• feat(server): Upload endpoint relay#5638
• feat(envelope): Attachment placeholder sentry-docs#16483
• https://develop.sentry.dev/sdk/telemetry/attachments/#attachment-placeholders
• https://develop.sentry.dev/sdk/telemetry/attachments/#attachment-placeholder-item

[jpnurmi]

@sentry review

[jpnurmi]

@cursor review

[jpnurmi]

@cursor review

[jpnurmi]

@cursor review

[jpnurmi]

@cursor review

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Autofix Details

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: copy_file_range fallback misses common filesystem errors
  • Expanded the copy_file_range fallback condition to also break on EXDEV, EOPNOTSUPP, and EINVAL so the read/write fallback handles these recoverable cases.

Or push these changes by commenting:

@cursor push 76476611c4

Preview (76476611c4)

diff --git a/src/path/sentry_path_unix.c b/src/path/sentry_path_unix.c
--- a/src/path/sentry_path_unix.c
+++ b/src/path/sentry_path_unix.c
@@ -362,7 +362,8 @@
             goto done;
         } else if (errno == EAGAIN || errno == EINTR) {
             continue;
-        } else if (errno == ENOSYS) {
+        } else if (errno == ENOSYS || errno == EXDEV || errno == EOPNOTSUPP
+            || errno == EINVAL) {
             break;
         } else {
             rv = 1;

_{This Bugbot Autofix run was free. To enable autofix for future PRs, go to the Cursor dashboard.}

[jpnurmi]

@cursor review

[jpnurmi]

@cursor review

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 730b3a2. Configure here.}