examples/unixfs-file-cid: use session for fetching blocks

[Jorropo]

No description provided.

[Jorropo]

Current dependencies on/for this PR:

• main
  • PR blockservice: add NewSessionContext and EmbedSessionInContext #549
    • PR examples/unixfs-file-cid: use session for fetching blocks #551 👈
    • PR gateway: add WithContextHint to handler and implement it on BlocksBackend #550

This stack of pull requests is managed by Graphite.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8109917) 65.61% compared to head (0e5383e) 65.18%.

@@                                           Coverage Diff                                           @@
##           01-12-blockservice_add_NewSessionContext_and_EmbedSessionInContext_     #551      +/-   ##
=======================================================================================================
- Coverage                                                                65.61%   65.18%   -0.43%     
=======================================================================================================
  Files                                                                      207      204       -3     
  Lines                                                                    25606    25540      -66     
=======================================================================================================
- Hits                                                                     16802    16649     -153     
- Misses                                                                    7334     7400      +66     
- Partials                                                                  1470     1491      +21     

Files	Coverage Δ
examples/unixfs-file-cid/main.go	43.13% <100.00%> (+1.92%)	⬆️

... and 21 files with indirect coverage changes