fix: improve network body parsing and truncation handling

[markushi]

:scroll: Description

This PR refactors the NetworkBody class and improves how network request/response bodies are parsed and handled, particularly for large or truncated content.

Key changes:

• Simplified NetworkBody from an interface with multiple implementations to a single class with a body field and optional warnings list
• Added NetworkBodyWarning enum to communicate parsing issues (JSON_TRUNCATED, TEXT_TRUNCATED, INVALID_JSON, BODY_PARSE_ERROR)
• Improved truncation handling in NetworkBodyParser to properly detect and mark truncated content
• Switched from JsonObjectReader to vendor JsonReader for more robust JSON parsing
• Updated SentryOkHttpInterceptor to peek at the correct amount of bytes to detect truncation

:bulb: Motivation and Context

Previously, the network body parsing had issues with:

1. Inconsistent handling of truncated content
2. No way to communicate parse warnings to consumers
3. Less robust JSON parsing

This change provides a cleaner API and better error/warning reporting.

:green_heart: How did you test it?

• Existing tests should pass
• Manual testing with large response bodies

:pencil: Checklist

• [ ] I added GH Issue ID & Linear ID
• [ ] I added tests to verify the changes.
• [x] No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• [ ] I updated the docs if needed.
• [ ] I updated the wizard if needed.
• [ ] Review from the native team if needed.
• [x] No breaking change or entry added to the changelog.
• [x] No breaking change for hybrid SDKs or communicated to hybrid SDKs.

:crystal_ball: Next steps

🤖 Generated with Claude Code

[github-actions[bot]]

Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	292.30 ms	347.96 ms	55.66 ms
Size	1.58 MiB	2.13 MiB	559.07 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
dba088c465439af6142917dc884a1919ff042722	321.78 ms	364.59 ms	42.82 ms
fcec2f233b744694bffee41e58e5a706e032ef51	328.91 ms	387.75 ms	58.84 ms
3998a959439d3be2d0fb349aa7155194c4831c28	415.94 ms	478.54 ms	62.60 ms
f634d01652b3f4ddf21398daf541b63620228184	359.58 ms	433.88 ms	74.30 ms
fc5ccaf5844ae029d93c566b6fd1b4f5c2e4da83	322.49 ms	405.25 ms	82.76 ms
9fbb1127f2d985a834f669b39d88441f21bdbf8c	404.51 ms	475.65 ms	71.14 ms
ee747ae50ffec79f1ea20d100ea98e8520ab4ed4	405.43 ms	485.70 ms	80.28 ms
951caf72e161c0854233d20019ce53b1f0ca9f15	323.66 ms	392.82 ms	69.16 ms
ee747ae50ffec79f1ea20d100ea98e8520ab4ed4	358.21 ms	389.41 ms	31.20 ms
f634d01652b3f4ddf21398daf541b63620228184	375.06 ms	420.04 ms	44.98 ms

App size

Revision	Plain	With Sentry	Diff
dba088c465439af6142917dc884a1919ff042722	1.58 MiB	2.13 MiB	558.99 KiB
fcec2f233b744694bffee41e58e5a706e032ef51	1.58 MiB	2.12 MiB	551.50 KiB
3998a959439d3be2d0fb349aa7155194c4831c28	1.58 MiB	2.10 MiB	532.96 KiB
f634d01652b3f4ddf21398daf541b63620228184	1.58 MiB	2.10 MiB	533.40 KiB
fc5ccaf5844ae029d93c566b6fd1b4f5c2e4da83	1.58 MiB	2.13 MiB	557.54 KiB
9fbb1127f2d985a834f669b39d88441f21bdbf8c	1.58 MiB	2.11 MiB	539.18 KiB
ee747ae50ffec79f1ea20d100ea98e8520ab4ed4	1.58 MiB	2.10 MiB	530.95 KiB
951caf72e161c0854233d20019ce53b1f0ca9f15	1.58 MiB	2.13 MiB	558.77 KiB
ee747ae50ffec79f1ea20d100ea98e8520ab4ed4	1.58 MiB	2.10 MiB	530.95 KiB
f634d01652b3f4ddf21398daf541b63620228184	1.58 MiB	2.10 MiB	533.40 KiB

Previous results on branch: fix/network-request-response-body-parsing

Startup times

Revision	Plain	With Sentry	Diff
8287b45a37e7056aa744cb79816f8da330ba442d	308.53 ms	359.32 ms	50.79 ms

App size

Revision	Plain	With Sentry	Diff
8287b45a37e7056aa744cb79816f8da330ba442d	1.58 MiB	2.13 MiB	559.07 KiB